Question

hai ô tô xuất phát từ a và b cùng một lúc và đi ngược chiều nhau . sau 2 giờ chúng gặp nhau.quãng đường a b dài 162 km

a,tìm vận tốc mỗi ô tô biết vận tốc của ô tô đi từ a bằng 4/5 vận tốc của ô tô đi từ b

b,điểm gặp nhau ở cách a bao nhiêu ki lô mét

Answer 1

Tổng vận tốc 2 xe : 162 : 2 = 81 km/giờ

Vận tốc ô tô đi từ A : 81 : (4 + 5) x 4 = 36 km/giờ

Vận tốc ô tô đi từ B : 81 - 36 = 45 km/giờ

Điểm gặp nhau cách A : 36 x 2 = 72 km

Answer 2

a,Tổng vận tốc hai xe là

\(162\div2=81\)[ km/h ]

Vận tốc của ô tô thứ nhất là

\(81\div(4+5)\times4=36\) [ km/h ]

Vận tốc của ô tô thứ hai là

81 - 36 = 45 [ km/h ]

b.Điểm gặp nhau cách A số kilomet là

\(36\times2=72\)[ km ]

Đáp số ; a,............

               b, .......

Chúc bạn học tốt

Answer 3

tổng van tốc hai xe la ; 162 :2 =81 [km/giờ]

van toc cua ôt thu nhat la ; 81 : [ 4+5] x4 =36 [km/gio]

van toc ôt thu 2 la ;81-36=45 [km/gio]

diem gap nhau cach a so km la ;36x2 =72km

đ/s ;a .45 km/h

b, 72km

Answer 4

Giải:

a) Tổng vận tốc của hai ô tô là:

        162 : 2 = 81 (km/giờ)

Vận tốc của ô tô đi từ A là:

81 : (4 + 5) x 4 = 36 (km/giờ)

Vận tốc của ô tô đi từ B là:

81 : (4 + 5) x 5 = 45 (km/giờ)

b) Chỗ gặp nhau cách A số ki-lô-mét là:

           36 x 2 = 72 (km)

       Đáp số: a) 36km/giờ và 45km/giờ

                     b) 72km.

Answer 5

Đáp án:

Giải thích các bước giải:Tổng vận tốc 2 xe là:

162:2=81(km/giờ)

Vận tốc ô tô đi từ A là:

81:9x4=36(km/giờ)

Vận tốc ô tô đi từ B là:

81-36=45(km/giờ)

Điểm gặp cách A là:

36x2=72(km)

Answer 6

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