Question

Из одного и того же пункта в противополжных направленях вышли бараш и копатыч. через 3 часа растояние между ними стало 21 км найдите скорость копатыча если скорость бараша 4 км/ч

Answer 1

21/3=7км/ч - общая скорость смешариков или скорость их отдаления друг от друга.
Скорость удаления в данном случае = скорость1 + скорость 2.
7-4=3км/ч
Ответ - 3 км/ч

Answer 2

Problem Analysis

We are given that a sheep (barash) and a hare (kopatych) start from the same point in opposite directions. After 3 hours, the distance between them is 21 km. We are also given that the speed of the sheep is 4 km/h. We need to find the speed of the hare (kopatych).

Solution

Let's assume the speed of the hare (kopatych) is v km/h.

After 3 hours, the sheep (barash) has traveled a distance of 4 km/h * 3 hours = 12 km.

The distance between the sheep and the hare is 21 km. Since they are moving in opposite directions, the total distance covered by both of them is the sum of their individual distances. Therefore, the distance covered by the hare is 21 km - 12 km = 9 km.

We can use the formula distance = speed * time to find the speed of the hare.

9 km = v km/h * 3 hours

Simplifying the equation, we get:

v km/h = 9 km / 3 hours

v km/h = 3 km/h

Therefore, the speed of the hare (kopatych) is 3 km/h.

Answer

The speed of the hare (kopatych) is 3 km/h.