Question

Из города в противоположных направлениях одновременно вышли два поезда . Скорость первого -57км/ч , что на 7 км/ч меньше скорости второго поезда. Какое расстояние будет между ними через 8 часов? СРОЧНО

Answer 1

Скорость второго 57+7=64км/ч
S¹=57*8=456км
S²=64*8=512км
ответ 512-456=56

Answer 2

Problem Analysis

We are given two trains that start simultaneously from a city in opposite directions. The speed of the first train is 57 km/h, which is 7 km/h slower than the speed of the second train. We need to find the distance between the two trains after 8 hours.

Solution

To find the distance between the two trains after 8 hours, we need to calculate the distance traveled by each train in 8 hours.

Let's assume the speed of the second train is x km/h. According to the problem, the speed of the first train is 7 km/h slower than the speed of the second train, so the speed of the first train is x - 7 km/h.

The distance traveled by a train can be calculated using the formula: distance = speed × time.

Therefore, the distance traveled by the first train in 8 hours is (x - 7) × 8 km, and the distance traveled by the second train in 8 hours is x × 8 km.

To find the total distance between the two trains after 8 hours, we need to subtract the distance traveled by the first train from the distance traveled by the second train.

Let's calculate the total distance:

Total distance = (x × 8) - ((x - 7) × 8)

Simplifying the equation:

Total distance = 8x - 8(x - 7)

Total distance = 8x - 8x + 56

Total distance = 56 km

Therefore, the distance between the two trains after 8 hours is 56 km.

Answer

The distance between the two trains after 8 hours will be 56 km.