Question

От пристани выехал катер сос коростью 40км ч. Одновременно с ним вышел ещёодин катер и двигался в том же направлении. Через 3ч второй катер обогнал первый на 30км.С какой скоростью шел второй катер?

Answer 1

Ответ:

50

Пошаговое объяснение:

V1-скорость первого катера

V2-скорость второго катера

t- время

V2 * t = V1 * t + 30

v2 = (V1 * t + 30)/t = (40 * 3 + 30) / 3 = 50

Answer 2

Problem Analysis

We are given that a boat left the dock with a speed of 40 km/h. At the same time, another boat started moving in the same direction. After 3 hours, the second boat overtook the first boat by 30 km. We need to find the speed of the second boat.

Solution

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

Since both boats are moving in the same direction, the relative speed of the second boat with respect to the first boat is the difference in their speeds: x - 40 km/h.

We are given that the second boat overtakes the first boat by 30 km in 3 hours. This means that the distance covered by the second boat in 3 hours is 30 km.

Using the formula distance = speed × time, we can write the equation:

30 = (x - 40) × 3

Simplifying the equation:

30 = 3x - 120

3x = 150

x = 50

Therefore, the speed of the second boat is 50 km/h.

Answer

The second boat was moving at a speed of 50 km/h.