When moving against the stream of the river, the motor boat travels a distance of 88 km in 8 hours.

When moving against the stream of the river, the motor boat travels a distance of 88 km in 8 hours. What is the speed of the boat in still water if the raft travels the same distance in 22 hours?

We will solve this task in steps and explain each of them in detail.
1) 88: 8 = 11 kilometers per hour – the speed of a motor boat against the stream of the river, so it covers a distance of 88 kilometers in 11 hours of movement;
2) 88: 22 = 4 kilometers per hour – the speed of the raft, since it sailed a distance of 88 kilometers in 11 hours;
3) 11 – 4 = 7 kilometers per hour – the speed of the motor boat in still water, since the speed of the motor boat against the river flow is 11 kilometers per hour, and the speed of the raft is 4 kilometers per hour.
Answer: 7 kilometers per hour.