The boat sailed 42 km along the river, then a motor ship followed it. The own speed of the boat is 18 km / h

| September 2, 2021 | education

The boat sailed 42 km along the river, then a motor ship followed it. The own speed of the boat is 18 km / h, and the own speed of the motor ship is 32 km / h. The speed of the river is 2 km / h. How many hours will the motor ship catch up with the boat? What is superfluous given in the content of the problem?

It is known from the problem statement. that the boat sailed along the river for 42 kilometers. The boat’s own speed is 18 km / h. The own speed of the ship is 32 km / h. The speed of the river is 2 km / h.

To begin with, let’s calculate the speed of convergence between the boat and the motor ship.

1) 32 – 18 = 14 (km / h) – the speed of approach between the boat and the motor ship.

Now we can answer the main question of the problem and calculate how many hours the motor ship will catch up with the boat.

2) 42: 14 = 3 (hours) – the ship will be able to catch up with the boat.

Answer: the motor ship will catch up with the boat in 3 hours.



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