The boat’s own speed is 9 km / h and the current speed is 1 km / h. How far will the boat cover if it moves 3 hours

| September 20, 2021 | education

The boat’s own speed is 9 km / h and the current speed is 1 km / h. How far will the boat cover if it moves 3 hours downstream, and 2 hours against the current?

First of all, we need to calculate the speed of the boat downstream. To do this, we need to add the current speed to the indicated boat speed.

1) 9 km / h + 1 km / h = 10 km / h – is the speed of the boat behind the current.

Next, let’s find out the distance that the boat will sail in three hours behind the current. To do this, we need to multiply the speed of the boat behind the current by the time:

2) 10 km / h * 3 hours = 30 km – the boat will sail behind the current.

Against current boat speed:

3) 9 km / h – 1 km / h = 8 km / h.

In 2 hours the boat will sail:

4) 8 km / h * 2 hours = 16 km.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.