The own speed of the ship is 24.5 km / h, the speed of the river is 1.3 km / h. First, the motor ship sailed for 0.4

The own speed of the ship is 24.5 km / h, the speed of the river is 1.3 km / h. First, the motor ship sailed for 0.4 hours on the lake, and then 3.5 hours against the stream along the river. What way the ship has traveled for all the time.

1. Let’s find at what speed per hour the motor ship was sailing against the stream of the river.

24.5 – 1.3 = 23.2 kilometers.

2. Let’s calculate which way he covered in 3.5 hours moving against the river.

3.5 * 23.2 = 81.2 kilometers.

3. Find out how many kilometers the ship sailed on the lake, if it is said that its own speed is 24.5 kilometers per hour and it took 0.4 hours on the way.

24.5 * 0.4 = 9.8 kilometers.

4. Let’s determine how many kilometers the ship has traveled.

81.2 + 9.8 = 91 kilometers.

Answer: The motor ship covered 91 kilometers in all the time.