A car travels 170 km at a speed of 42,5 km/h . Find the time car takes to cover this distance .
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At 8:24 AM,a motorbike travels from A to B at a speed of 36 km/h.At 9:00 AM,a car travels from A to B at a speed of 54km/h and is able to catch up with the motorbike at B.Find the distance from A to B in kilometers.
Dịch : Lúc 8 giờ 24 phút,một chiếc xe máy đi từ A đến B với vận tốc 36 km/h.Lúc 9 giờ,một chiếc ô tô đi từ A đến B với vận tốc 54 km/h và đuổi kịp xe máy tại B.Quãng đường AB dài bao nhiêu km ?
Giải : Xe máy đi trước ô tô : 9 giờ - 8 giờ 24 phút = 36 phút = 0,6 giờ
Khi ô tô khởi hành thì 2 xe cách nhau : 36 x 0,6 = 21,6 (km)
Hiệu vận tốc 2 xe là : 54 - 36 = 18 (km/h)
Ô tô đuổi kịp xe máy sau : 21,6 : 18 = 1,2 (giờ)
Quãng đường AB là : 54 x 1,2 = 64,8 (km)
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Thời gian xe máy đi trước ô tô là:
9 giờ - 8 giờ 24 phút = 36( phút )
Đổi : 36 phút = 0,6 giờ
Khi ô tô khởi hành thì 2 xe cách nhau là:
36 x 0,6 = 21,6 ( km )
Sau mỗi giờ , ô tô đi hơn xe máy là:
54 - 36 = 18 ( km )
Thời gian ô tô đuổi kịp xe máy là:
21,6 : 18 = 1,2 ( giờ )
Quãng đường AB dài là:
54 x 1,2 = 64,8 ( km )
Đáp số: 64,8 km
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Mr.Joseph drives car from A to B at a constant speed. If the speed of the car is increased by 20%, it takes him one hour less than the usual time. If he drives at the constant speed for the first 100km before increasing the speed by 30%, it also takes him one hour less than the usual. The distance of AB is ..........km.
Gọi S là quãng đường
v là vận tốc
t là thời gian Mr.J đi thường ngày
=>\(\dfrac{S}{120\%v}=t-1\)
\(\dfrac{100}{v}+\dfrac{S-100}{130\%v}=t-1\)
=>\(\dfrac{S}{120\%v}=\dfrac{100}{v}+\dfrac{S-100}{130\%v}\)
<=>\(\dfrac{130S}{156v}=\dfrac{15600+120S-12000}{156v}\)
<=>\(10S=3600\)
<=>\(S=360\)
Xong rầu đó khỏi cảm ơn 
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Question 1Bob drove from City P to City Q. He traveled the first 36km at an average speed of 54km/h. He traveled the remaining 96km at a average speed of 72km/h. Find his average speed for the whole trip.Answer: km/h.Question 2John drove from Town A to Town B in 5 hours. His average speed for the first 3.5 hours was 64km/h. His average speed for the last 1.5 hours was 60km/h. What was the total distance he traveled? Answer: km.Question 3A car traveled at 50km/h for 2 hours and at 60km/h for 3 ho...
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Question 1
Bob drove from City P to City Q. He traveled the first 36km at an average speed of 54km/h. He traveled the remaining 96km at a average speed of 72km/h. Find his average speed for the whole trip.
Answer: km/h.
Question 2
John drove from Town A to Town B in 5 hours. His average speed for the first 3.5 hours was 64km/h. His average speed for the last 1.5 hours was 60km/h. What was the total distance he traveled?
Answer: km.
Question 3
A car traveled at 50km/h for 2 hours and at 60km/h for 3 hours. What is the car’s average speed?
Answer: km/h
Question 1:66 km/h
Question 2:314 km
Question 3:200/9 km/h
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Question 1:66 km/h
Question 2:314 km
Question 3:56 km/h
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1.The Ford car left Hanoi for Nghe An and the Audi car left Nghe An for Hanoi at the same time. The ratio of their speeds (the Ford car to the Audi car) was 4:3. The Ford car decreased its speed by 25% and the Audi car increased its speed by 25% after they had passed each other. When the Ford car reached Nghe An, the Audi car was still 20 km away from Hanoi. The distance between Hanoi and Nghe An is .... km
2.The smallest value of A frac{x-y}{x^{4}+y^{4}+6} is.....
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1.The Ford car left Hanoi for Nghe An and the Audi car left Nghe An for Hanoi at the same time. The ratio of their speeds (the Ford car to the Audi car) was 4:3. The Ford car decreased its speed by 25% and the Audi car increased its speed by 25% after they had passed each other. When the Ford car reached Nghe An, the Audi car was still 20 km away from Hanoi. The distance between Hanoi and Nghe An is .... km
2.The smallest value of A= \(\frac{x-y}{x^{4}+y^{4}+6}\) is.....
A car traveled at a constant speed for 5 hours, covering a total distance of 301 km. How far did the car travel for one hour?
The speed of the car is :
301 : 5 = 60,2 (km/h)
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là 60,2 mk chắc vì đó là đáp án violympic toán tiếng anh lớp 6
mk lm đúng
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both A and B province 105 km apart. motnguoi at 8 hours 15 minutes cycling from A to B at the same time a car from B to A. the two met at 9 hours 30 minutes
Asian. the velocity of each car knows the speed of each car knows the speed of the automobile velocity 5x bicycle
b. A confluence how many kilometers?
The Ford car left Hanoi for Nghe An and the Audi car left Nghe An for Ha Noi at the same time. The ratio of their speeds (the Ford car to the Audi car) was 4 : 3. The Ford decreased its speed by 25% and the Audi car increased its speed by 25% after they had passed each other.
When the Ford car reached Nghe An, the Audi car was still 20km away from Hanoi. The distance between Hanoi and Nghe An is ...... km.
The Ford car left Hanoi for Nghe An and the Audi car left Nghe An for Ha Noi at the same time. The ratio of their speeds (the Ford car to the Audi car) was 4 : 3. The Ford decreased its speed by 25% and the Audi car increased its speed by 25% after they had passed each other.
When the Ford car reached Nghe An, the Audi car was still 20km away from Hanoi. The distance between Hanoi and Nghe An is ...... km.
The Ford car left Hanoi for Nghe An and the Audi car left Nghe An for Ha Noi at the same time. The ratio of their speeds (the Ford car to the Audi car) was 4 : 3. The Ford decreased its speed by 25% and the Audi car increased its speed by 25% after they had passed each other.
When the Ford car reached Nghe An, the Audi car was still 20km away from Hanoi. The distance between Hanoi and Nghe An is ...... km.
