Question

Из двух пунктов А и Б вышли одновременно вниз по реке две моторные лодки . скорость первой лодки (из А) 8,5 км/ч , а скорость второй лодки ( из В ) - 7,9 км/ч . через 1/8 часа первая лодка догнала вторую . каково расстояние между А и В.

Answer 1

1) 8,5-7,9=0,6 км в час скорость 1 лодки больше 2
2) 1/8=0,125
3) 0,6*0,125=0,075 км или 75 мнтров

Answer 2

Problem Analysis

We have two motorboats, A and B, that start simultaneously from points A and B on a river. The speed of boat A is 8.5 km/h, and the speed of boat B is 7.9 km/h. After 1/8 hour, boat A catches up to boat B. We need to find the distance between points A and B.

Solution

Let's assume that the distance between points A and B is D km.

Since boat A catches up to boat B after 1/8 hour, we can calculate the distance covered by each boat during this time.

The distance covered by boat A in 1/8 hour is (1/8) * 8.5 km = 1.0625 km.

The distance covered by boat B in 1/8 hour is (1/8) * 7.9 km = 0.9875 km.

Since boat A catches up to boat B, the distance covered by boat A must be equal to the distance covered by boat B.

Therefore, we can set up the following equation:

1.0625 km = 0.9875 km + (D - 0.9875) km

Simplifying the equation:

1.0625 km = 0.9875 km + D km - 0.9875 km

0.075 km = D km

So, the distance between points A and B is 0.075 km.

The distance between points A and B is 0.075 km.

Answer

The distance between points A and B is 0.075 km.