Question

От 2 пристаней, расстояние между которыми 240 километров, отошли Одновременно навстречу друг другу катер и теплоход. Катер шел со скоростью 20 километров в час, а теплоход со скоростью 30 километров в час. Какое расстояние будет между катером и теплоходом через 4 часа

Answer 1

Общая скорость:
20+30 =50 км в час
50*4=200 км проедут
240-200=40 км
или 
20*4= 80 проедет первый
30*4= 120 второй
240-80-120=40

Answer 2

Problem Analysis

We are given two vessels, a boat and a ship, which start from two different ports and travel towards each other. The boat travels at a speed of 20 kilometers per hour, and the ship travels at a speed of 30 kilometers per hour. We need to find the distance between the boat and the ship after 4 hours.

Calculation

To find the distance between the boat and the ship after 4 hours, we need to calculate the distance traveled by each vessel.

The boat travels at a speed of 20 kilometers per hour for 4 hours, so the distance traveled by the boat is: Distance traveled by the boat = Speed of the boat × Time = 20 km/h × 4 h = 80 km.

Similarly, the ship travels at a speed of 30 kilometers per hour for 4 hours, so the distance traveled by the ship is: Distance traveled by the ship = Speed of the ship × Time = 30 km/h × 4 h = 120 km.

Now, to find the distance between the boat and the ship, we subtract the distance traveled by the boat from the total distance between the two ports: Distance between the boat and the ship = Total distance between the two ports - Distance traveled by the boat = 240 km - 80 km = 160 km.

Answer

Therefore, the distance between the boat and the ship after 4 hours will be 160 kilometers.