Question

Из двух портов,растояние между которыми равно83 км,одновременно в противоположных направлениях вышли два теплохода.скорость первого теплохода равна 32 км/ч.через 4ч растояние между двумя теплоходами была равна 355 км.сколько км проплыл второй теплоход?с какой скоростью он плыл?

Answer 1

32*4=128 км - первый проехал
355-128-83=144 - второй проехал
144:4=36 км/ч - скорость второго

Answer 2

1)32×4=128км(первый теплоход)
2) 355-83-128=144 км(такое расстояние прошел 2 теплоход за 4 ч)
3)144÷4=36 км/ч(скорость 2 теплохода)

Answer 3

Problem Analysis

We have two ships that start from two ports simultaneously and travel in opposite directions. The distance between the ports is 83 km. After 4 hours, the distance between the two ships is 355 km. We need to find out how far the second ship has traveled and at what speed it is moving.

Solution

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

After 4 hours, the first ship has traveled a distance of 32 km/h * 4 h = 128 km.

The total distance covered by both ships after 4 hours is 355 km. Therefore, the second ship has traveled a distance of 355 km - 128 km = 227 km.

To find the speed of the second ship, we can use the formula:

Speed = Distance / Time

The time taken by the second ship to cover a distance of 227 km is 4 hours. Therefore, the speed of the second ship is:

Speed = 227 km / 4 h = 56.75 km/h

So, the second ship has traveled 227 km and its speed is 56.75 km/h.

Answer

The second ship has traveled 227 km and its speed is 56.75 km/h.

Explanation

The first ship travels at a constant speed of 32 km/h. After 4 hours, it has traveled a distance of 128 km. The second ship's speed is unknown, so we assume it to be x km/h. The total distance covered by both ships after 4 hours is 355 km. Therefore, the second ship has traveled a distance of 355 km - 128 km = 227 km. To find the speed of the second ship, we use the formula Speed = Distance / Time. The time taken by the second ship to cover a distance of 227 km is 4 hours. Therefore, the speed of the second ship is 227 km / 4 h = 56.75 km/h.