Question

От пристани в одном направлении отплыли одновременно два корабля. Скорость первого 25 км\ч. Через 5 часов расстояние, которое прошел второй корабль, составляло 4/5 расстояния, которое прошел первый корабль. Найдите скорость второго корабля

Answer 1

25*5=125 км прошел 1 корабль
125:5*4=100 км прошел 2 корабль
100:5=20 км\ч скорость 2 корабля

Answer 2

25*3=25*3=75(км)- проплыл 1 катер
168-75=93(км)- проплыл 2 катер
93:3=31(км/ч)- скорость 2 катера
ответ:31км/ч

Answer 3

Problem Analysis

We are given that two ships depart from a port in the same direction at the same time. The speed of the first ship is 25 km/h. After 5 hours, the distance traveled by the second ship is 4/5 of the distance traveled by the first ship. We need to find the speed of the second ship.

Solution

Let's assume the speed of the second ship is x km/h.

The distance traveled by the first ship in 5 hours is: Distance1 = Speed1 * Time = 25 km/h * 5 h = 125 km.

According to the problem, the distance traveled by the second ship in 5 hours is 4/5 of the distance traveled by the first ship: Distance2 = (4/5) * Distance1.

Substituting the value of Distance1, we have: Distance2 = (4/5) * 125 km = 100 km.

Now, we can use the formula Speed = Distance / Time to find the speed of the second ship: x = Distance2 / Time = 100 km / 5 h = 20 km/h.

Therefore, the speed of the second ship is 20 km/h.

Answer

The speed of the second ship is 20 km/h.