Tom and Jelly embarked on a moving escalator to the second floor of a shopping mall. Tom walked up the escalator at a speed of 2 steps every second. At the same time, Jelly walked up the same escalator at a speed of 3 steps every 2 seconds. Tom arrived at the second floor in 25 seconds. It took Jelly 30 seconds to reach same floors. How many steps had the escalator when it stationary ?
Những câu hỏi liên quan
(IMAS) The houses of Mary and Jerry are connected by a trail. One day, they started from their house at the same time and walked towards the other's house. The speed of Mary is 1.5 times that of Jerry and they met 12 minutes later. On the next day, Mary left his house and walked to Jerry's house at the same speed. How long would it take Mary to reach Jerry's house?
The distance between John’s home and the park is 3000m. John walked from his home to the park at a speed of 100m per minute and then walked back home at a speed of 150m per minute. What is the John’s average speed in meter per minute?
Khoảng cách giữa nhà John và công viên là 3000m . John đi từ nhà mình đến công viên với tốc độ 100m trong một phút và sau đó đi bộ trở về nhà với tốc độ 150m mỗi phút. tốc độ trung bình của John trong mét mỗi phút là gì ?
mk chỉ ra đề thui bn nào bít giải thì k cho mk nha
Đúng 0
Bình luận (0)
Khoảng cách giữa nhà John và công viên là 3000m . John đi từ nhà mình đến công viên với tốc độ 100m trong một phút và sau đó đi bộ trở về nhà với tốc độ 150m mỗi phút. tốc độ trung bình của John trong mét mỗi phút là gì ?
Đúng 0
Bình luận (0)
Tu nha den cong vien mat so phut la : 3000 : 100 = 30 (phut)
Tu cong vien ve nha mat so phut la : 3000 : 150 = 20 (phut)
Toc do trung binh cua John trong moi phut la : 3000 : ( 20 + 30 ) = 60 (phut)
Đúng 0
Bình luận (0)
Xem thêm câu trả lời
Correct each phrase fragment by changing or adding words or by attaching the phrase to the complete sentence nearby
1. We shopped all day at the mall. Looking for the perfect suitcases to take on our cruise this summer.
2. We were sure that one of the specialty stores would carry a good selection. With hard and soft luggage, large and small sizes, and lots of acces sories to choose from.
3. Walking from store to store and getting tired. We gave up after a while and ate lunch.
4. We could not...
Đọc tiếp
Correct each phrase fragment by changing or adding words or by attaching the phrase to the complete sentence nearby
1. We shopped all day at the mall. Looking for the perfect suitcases to take on our cruise this summer.
2. We were sure that one of the specialty stores would carry a good selection. With hard and soft luggage, large and small sizes, and lots of acces sories to choose from.
3. Walking from store to store and getting tired. We gave up after a while and ate lunch.
4. We could not believe how crowded the mall was on a weekday. In every shop and at the food court, too
5. Everywhere we looked people stood around. Crowding the walkways and window shopping.
6. Many teenagers gathered in groups. Laughing at each other and ignoring the shoppers.
7. Pairs of older people walked briskly around the balconies. Using the mall as an exercise track.
8. Actually, we did enjoy ourselves as we ate. Watching all the curious people around us.
9. We finally found the luggage we were looking for in a tiny shop. Near the elevators at the end of the mall.
10. Without the crowds and the poor selection. Our shopping trip would have been a complete success.
The distance between John’s home and the park is 3000m. John walked from his home to the park at a speed of 100m per minute and then walked back home at a speed of 150m per minute. What is the John’s average speed in meter per minute?
Dịch : Nhà John cách công viên 3000 m.John đi bộ từ nhà tới công viên với vận tốc 100m/phút rồi về nhà với vận tốc 150m/phút.Tính vận tốc trung bình của John (đơn vị m/phút).
Giải : John đi từ nhà tới công viên mất : 3000 : 100 = 30 (phút)
John đi từ công viên về nhà mất : 3000 : 150 = 20 (phút)
Quãng đường mà John đi là : 3000 x 2 = 6000 (m)
Thời gian John đi và về là : 30 + 20 = 50 (phút)
Vận tốc trung bình của John là : 6000 : 50 = 120 (m/phút)
Đúng 0
Bình luận (0)
ĐỀ BÀI
Khoảng cách từ nhà John đến công viên là 3000m.John đã đitừ nhà tới công viên với vận tốc 100m/phút và rồi trở về với vận tốc 150m/phút .Tính vận tốc trung bình của John với đon vị m/phút
GIẢI
Vận tốc trung bình của John là
\(\frac{100+150}{2}=125\)(m/phút)
ĐS:........................
Đúng 100% luôn .Bạn k mình nha
Đúng 0
Bình luận (0)
Xem thêm câu trả lời
the distance between John’s home and the park is 3000m. John walked from his home to the park at a speed of 100m per minute and then walked back home at a speed of 150m per minute. What is the John’s average speed in meter per minute?
cái bài tương tự ngay bên cạnh mà không xem rảng quá rùi đăng hả
Đúng 0
Bình luận (0)
The number of time to take for John to go to the park is :
3000 : 100 = 30 ( minutes )
The number of time to take for John to go back to home is :
3000 : 150 = 20 ( minutes )
The length of the road John walked is :
3000 + 3000 = 6000 ( meters )
The long of time John walked is :
30 + 20 = 50 ( minutes )
His average speed is :
6000 : 50 = 120 ( meters/min )
Ans : 120 meters/min
Đúng 0
Bình luận (0)
Xem thêm câu trả lời
the distance between John’s home and the park is 3000m. John walked from his home to the park at a speed of 100m per minute and then walked back home at a speed of 150m per minute. What is the John’s average speed in meter per minute?
Xem thêm câu trả lời
24 tháng 12 2022 lúc 22:25
Complete the second sentence so that it means the same as the first one.1. The exam makes her feel nervous and stressed out - Because of _________2. This is the first time Ive ever walked in such a crowded street.- Ive never ____________3. Jimmy came late this morning because of the heavy traffic jams.- Jimmy didnt turn _______4. Why did Freddy drop out of school last year? Susan said to herself- Susan wondered _______5. I dont know about this type of handicraft as well as my cousin does.- My c...
Đọc tiếp
Complete the second sentence so that it means the same as the first one.
1. The exam makes her feel nervous and stressed out
-> Because of _________
2. This is the first time I've ever walked in such a crowded street.
-> I've never ____________
3. Jimmy came late this morning because of the heavy traffic jams.
-> Jimmy didn't turn _______
4. " Why did Freddy drop out of school last year?" Susan said to herself
-> Susan wondered _______
5. I don't know about this type of handicraft as well as my cousin does.
-> My cousin does _______
6. Kelvin would rather play sports at weekends than do exercises every day
-> Kelvin preferred playing _____
7. Johnny said to me " If I were you, I wouldn't be worried about exam so much"
-> Johnny advised me _____
8. I'm looking forward to having one - day trip around your city.
-> I'm really excited ______
1. The exam makes her feel nervous and stressed out
-> Because of __the exam, she feels nervous and stressed out_______
2. This is the first time I've ever walked in such a crowded street.
-> I've never ___walked in such a crowded street before_________
3. Jimmy came late this morning because of the heavy traffic jams.
-> Jimmy didn't turn __up early this morning because of the heavy traffic jams_____
4. " Why did Freddy drop out of school last year?" Susan said to herself
-> Susan wondered __why Freddy had dropped out of school the previous year_____
5. I don't know about this type of handicraft as well as my cousin does.
-> My cousin does __not know about this type of handicraft as badly as I do_____
6. Kelvin would rather play sports at weekends than do exercises every day
-> Kelvin preferred playing __sports at weekends to doing exercises every day___
7. Johnny said to me " If I were you, I wouldn't be worried about exam so much"
-> Johnny advised me _not to be worried about exam so much____
8. I'm looking forward to having one - day trip around your city.
-> I'm really excited __about having one-day trip around your city____
Đúng 1
Bình luận (0)
III. Complete the second sentences so that it has the same meaning as the first. 1. I went swimming every Thursday when I was at school.I used ____________________________________________________________2. Mai walked to school when she was in primary school.Mai went __________________________________________________________3. Why dont we cycle to the town at the weekend?How about ________________________________________________________?4. The distance between my house and the nearest bookstore...
Đọc tiếp
III. Complete the second sentences so that it has the same meaning as the first.
1. I went swimming every Thursday when I was at school.
I used ____________________________________________________________
2. Mai walked to school when she was in primary school.
Mai went __________________________________________________________
3. Why don't we cycle to the town at the weekend?
How about ________________________________________________________?
4. The distance between my house and the nearest bookstore is about 2 kilometres
It ________________________________________________________________
5. The airport is not far from the hotel.
The hotel is ________________________________________________________
6. What’s the distance from Madrid to Barcelona?
How ______________________________________________________________
7. Turn left into Lavalle Street and then go straight ahead.
Make _____________________________________________________________
8. Did your father use to drive to work?
Did your father use to travel___________________________________________?
1.I used to go swimming......
2.Mai went to school on foot when she was in primary school.( walk to school = go to school on footy )
3.How about cycling to the town at the weekend?( how about Ving? = why don't we V?)
4. It is about 2 kilometres from my house to the nearest bookstore.( it is (about) + khoảng cách + from....to.... )
5. The hotel is near the airport.( near ~ not far from )
6. How far is it from Ha Noi to Vung Tau?(khoảng cách : how far )
Đúng 1
Bình luận (0)
II. Complete the second sentences so that it has the same meaning as the first.1. I went swimming every Thursday when I was at school.I used ____________________________________________________________2. Mai walked to school when she was in primary school.Mai went __________________________________________________________3. Why dont we cycle to the town at the weekend?How about ________________________________________________________?4. The distance between my house and the nearest bookstore is...
Đọc tiếp
II. Complete the second sentences so that it has the same meaning as the first.
1. I went swimming every Thursday when I was at school.
I used ____________________________________________________________
2. Mai walked to school when she was in primary school.
Mai went __________________________________________________________
3. Why don't we cycle to the town at the weekend?
How about ________________________________________________________?
4. The distance between my house and the nearest bookstore is about 2 kilometres
It ________________________________________________________________
5. The airport is not far from the hotel.
The hotel is ________________________________________________________
6. What’s the distance from Madrid to Barcelona?
How ______________________________________________________________
7. Turn left into Lavalle Street and then go straight ahead.
Make _____________________________________________________________
8. Did your father use to drive to work?
Did your father use to travel___________________________________________?
plssss giải thích giùm với ạ