The boat covered a distance of 52 km on the lake in 4 hours without stopping, and along the river against

The boat covered a distance of 52 km on the lake in 4 hours without stopping, and along the river against the current, the speed of which is 3 km / h, covered 30 km in 4 hours, making one stop. how long was the stop?

1) Find out the boat’s own speed: 52: 4 = 13 (km / h);
2) Let’s calculate the speed of the boat against the current: 13 – 3 = 10 (km / h);
3) Let’s find how long the boat was on the road, moving against the current: 30: 10 = 3 (h);
4) Find out how long the stop lasted: 4 – 3 = 1 (h).
Answer: the boat stop lasted 1 hour.