một ô tô chạy từ tỉnh A, nếu chạy mỗi giờ 60 km thì ôtô đến B lúc 15 giờ.nếu chạy mỗi giờ 40 km thì ôtô đến B lúc 17gio. tính quãng đường AB
Tỉ số giữa 2 vận tốc là : 60:40==3/2 Vì khi đi cùng một quãng đường thì vận tốc tỉ lệ nghịchvới thời gian nên : «Nếu thời gian đi quãng đường AB với vân tốc 60km /h là 2 phần thì là 3 phan nhu the»
Mot phan thời gian nhiều hơn ứng với :
17-15=2(gio)
Vậy với vận tốc 60 km /h ô tô đi từ A đến B mất :
2 + 2=4(gio)
Quãng đường AB dài là :
60 4= 240(km)
Đúng đó đáp số là 240
Đúng 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Một ô tô chạy từ tỉnh A và đến tỉnh B lúc 16 giờ. Nếu chạy mỗi giờ 60 km thì ô to sẽ đến B lúc 15 giờ, nếu chạy mỗi giờ 40 km thì ô tô sẽ đến B lúc 17 giờ. Hỏi:
a, Hãy tính xem hai tỉnh A và B cách nhau bao nhiêu km?
b, Hãy tính xem trung bình mỗi giờ ô tô phải chạy bao nhiêu km để đến B đúng lúc 16 giờ?
Ai nhanh mình tick cho!!!!
Một ô tô chạy từ tỉnh A đến tỉnh B lúc 16 giờ. Nếu chạy mỗi giờ 60 km thì ô tô đến B lúc 15 giờ. Nếu chạy mỗi giờ 40 km thì ô tô đến B lúc 17 giờ.
Câu a: Hãy tính xem tỉnh A và tỉnh B cách nhau bao nhiêu km?
Câu b: Hãy tính xem trung bình mỗi giờ ô tô phải đi bao nhiêu km để đến B lúc 16 giờ?
Tỉ số giữa 2 vận tốc là : 60:40=3/2
Vì khi đi cùng một quãng đường thì vận tốc tỉ lệ nghịchvới thời gian nên :«Nếu thời gian đi quãng đường AB với vân tốc 60km /h là 2 phần thì là 3 phan nhu the»
Mot phan thời gian nhiều hơn ứng với :
17-15=2(gio)
Vậy với vận tốc 60 km /h ô tô đi từ A đến B mất :
2 2=4(gio)
a,Quãng đường AB dài là :
60 4= 240(km)
Thời gian quy định để chạy từ A đến B là:
4+(16-15)=5(gio)
b, Vận tốc là :
240:5=48(km/h)
Ds:a,240km
b,48 km/h
một ô tô chạy từ tỉnh A đến tỉnh B nếu chạy mỗi giờ 60 km thì ô tô sẽ đến lúc 15 giờ. Nếu chạy mỗi giờ 40 km thì ô tô đến B lúc 17 giờ.
a) Hãy tính xem hai tỉnh A và B cách nhau bao nhieu ki - lô - mét.
b) Hãy tính xem ô tô phải chạy với vận tốc bao nhiêu để đến B lúc 16 giờ.
Help yourself with hurry. Thank you, every one.
1 ô tô chạy từ tỉnh A và dự kiến đến tỉnh B vào lúc 16 giờ.Nếu chạy mỗi giờ 60 km thì ô tô sẽ đến B lúc 15 giờ,nếu chạy mỗi giờ 40 km thì ô tô sẽ đến B lúc 17 giờ.
Tính quãng đường 2 tỉnh AB
#)Giải :
Vận tốc 60km so với 40km là :
60 : 40 = 3/2
Vậy thời gian ô tô đi 60km bằng 3/2 thời gian ô tô đi 40km
Thời gian đi 60km hơn thời gian đi 40km là :
17 giờ - 15 giờ = 2 ( giờ )
Thời gian ô tô đi hết quãng đường AB là :
2 : ( 3 - 2 ) x 3 = 6 ( giờ )
Quãng đường hai tỉnh AB dài là :
6 x 40 = 240 ( km )
Đ/số : ............................
#~Will~be~Pens~#
Bài Giải:
Quãng đường hai tỉnh AB là:
60 x 15 + 60 = 960 (km)
Đáp số: 960 km
Một ôtô dự định chạy từ tỉnh A đến tỉnh B lúc 16giờ. Nhưng:
- Nếu chạy với vận tốc 60 km/giờ thì ôtô sẽ tới B lúc 15giờ.
- Nếu chạy với vận tốc 40km/giờ thì ôtô sẽ tới B lúc 17giờ. Hỏi ôtô phải chạy với vận tốc bao nhiêu để tới B lúc 16giờ?
Tỉ số giữa hai vận tốc là: 60 : 40 = 3/2
Vì khi đi cùng một quãng đường thì vận tốc tỉ lệ nghịch với thời gian nên: “Nếu thời gian đi quãng đường AB với vận tốc 60km/giờ là 2 phần thì thời gian đi với vận tốc 40km/giờ là 3 phần như thế”
Một phần thời gian nhiều hơn ứng với:
17 – 15 = 2 (giờ)
Vậy với vận tốc 60km/giờ ôtô đi từ A đến B mất:
2 x 2 = 4 (giờ)
Quãng đường AB dài là: 4 x 60 = 240(km)
Thời gian quy định để chạy từ A đến B là:
4 + (16 – 15) = 5 (giờ)
Vận tốc phải tìm là: 240 : 5 = 48 (km/giờ)
Đáp số: 48km/giờ.
Một ô tô chạy từ tỉnh A đến tỉnh B lúc 16 giờ . Nếu chạy mỗi giờ 60km thì đến nơi lúc 15 . Nếu chạy mỗi giờ 40km thì ô tô sẽ đến B lúc 17 giờ .
a) Tính xem 2 tỉnh A và B cách nhau bao nhiêu km?
b) Hay tính xem trung bình mỗi giờ ô tô phải chạy bao nhiêu km để đến B đúng 16 giờ ?
1 ô tô chạy từ tỉnh A và dự kiến đến tỉnh B lúc 16 giờ. Nếu mỗi giờ chạy 60km thì ô tô đến B lúc 15 giờ, nếu chạy 1 giờ 4km thì ô tô sẽ đến B lúc 17 giờ :
a, Hỏi 2 tỉnh AB cách nhau bao nhiêu km?
b, Tính trung bình 1 giờ ô tô phải chạy bao nhiêu km để đến B đung thời gian dự định
Một ô tô chạy từ A đến B. Nếu mỗi giờ xe chạy 60km thì sẽ đến B lúc 15 giờ; nếu mỗi giờ xe chạy 40 km thì sẽ đến B lúc 17 giờ cùng ngày.
a/ Hỏi hai tỉnh A và B cách nhau bao nhiêu ki – lô – mét?
b/ Hãy tính xem trung bình mỗi giờ xe phải chạy bao nhiêu ki – lô – mét để đến B vào lúc 16 giờ ngày hôm đó?
