một ô tô chạy từ À,nếu chạy mỗi giờ 60 km thì đến B lúc 15 giờ.nếu chạy mỗi giờ 40 km thì đến B lúc 17 giờ.tính quãng đường AB?
1 ô tô chạy từ tỉnh A nếu chạy mỗi giờ 60 km thì ô tô đến B lúc 15 giờ .Nếu mỗi giờ 40 km thì ô tô đến B lúc 17 giờ.Tính quãng đường AB
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 ô chạy từ tỉnh A,nếu chạy mỗi giờ 60km thì ô tô đến B lúc 15 giờ.Nếu chạy mỗi gờ 20 km thì ô tô đến B lúc 17 giờ.Tính quãng đường AB
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
Ô tô chạy từ tỉnh A. Nếu chạy mỗi giờ 60 km thì ô tô đến B lúc 15 giờ. Nếu chạy mỗi giờ 40 km hì ô tô đến B lúc 17 giờ. Tính quãng đường AB.
Quãng đướng AB nếu mỗi giờ 60km thì đến B lúc 15 giờ là :
60 x 15 = 900 (km)
Quangc đường AB nếu mỗi giờ chạy 40km thì đến B lúc 18 giờ là :
40 x 17 = 680 (km)
Đ/S : .....
Nếu chạy 60km/h thì QĐ sẽ bằng:
60 x 15 = 900km
Nếu chạy 40km/h thì QĐ sẽ bằng:
40 x 17 = 680km
hok tốt
#~DCT3,14~
bài 1: ô tô chạy từ A đến B . Nếu chạy mỗi giờ 60 km thì ô tô đến B lúc 14 giờ. Nếu chạy mỗi giờ 40 km thì ô tô đến B lúc 16 giờ . Hãy tính quãng đường AB và tìm xem trung bình mỗi giờ ô tô chạy bao nhiêu km để đến B lúc 15 giờ?
1 ô tô đi từ a đến b Nếu chạy mỗi giờ chạy mỗi giờ 60 km thì ô tô đến lúc đến B lúc 14 Nếu chạy mỗi giờ 40 km thì ô tô chạy đến B lúc 16 tính quãng đường AB
nhanh nhé hứa tick 15 đúng ạ
Quãng đướng AB nếu mỗi giờ 60km thì đến B lúc 14 giờ là :
60 x 14 = 840 (km)
Quãng đường AB nếu mỗi giờ chạy 40km thì đến B lúc 16 giờ là :
40 x 16 = 640 (km)
Mỗi giờ 60km thì đến B lúc 14 giờ đi được quãng đường là
\(\text{ 60 x 14 = 840 (km)}\)
Mỗi giờ chạy 40km thì đến B lúc 16 giờ đi được quãng đường là
\(\text{ 40 x 16 = 640 (km)}\)
: Một ô tô chạy từ A đến B. Nếu chạy mỗi giờ 60 km thì ô tô sẽ đến B lúc 14 giờ. Nếu chạy mỗi giờ 40 km thì ô tô sẽ đến B lúc 16 giờ. Hãy tính quãng đường AB.
giúp mình với mn
Hiệu 2 vận tốc:
60 - 40=20(km/h)
Sau khi ô tô tới B thì xe máy cần phải chạy thêm:
40 x 2= 80(km)
Ô tô chạy quãng đường AB mất:
80:20=4(giờ)
Quãng đường AB dài:
4 x 60 = 240(km)
Hiệu thời gian là :
16 giờ - 14 giờ = 2 giờ
Thời gian đi 60 km là :
2 x 2 = 4 giờ ( vì thời gian đi 60 km là 2 phần )
Quãng đường AB là :
60 x 4 = 240 (km)
Hiệu 2 vận tốc:
60 - 40=20(km/h)
Sau khi ô tô tới B thì xe máy cần phải chạy thêm:
40 x 2= 80(km)
Ô tô chạy quãng đường AB mất:
80:20=4(giờ)
Quãng đường AB dài:
4 x 60 = 240(km)
ĐS
1 ô tô chạy từ tỉnh A đến tỉnh B lúc 16 giờ.Nếu mỗi giờ chạy 60km thì ô tô sẽ đến B lúc 15 giờ.Nếu chạy mỗi giờ 40km thì ô tô sẽ đến B lúc 17 giờ.
a,Tính quãng đường AB.
b,Hỏi mỗi giờ ô tô phải chạy bao nhiêu km để đến B lúc 16 giờ?
Các bạn nhớ ghi lời giải đầy đủ nha!