How many kilometers does a steamer travel in 1/4 hour if it travels 50 km in an hour?

The solution of the problem.
1 way.
Let’s compose and solve the proportion:
1 hour – 50 km,
1/4 hour – х km,
1: 1/4 = 50: x, then x = 50 * 1/4 = 50 * 0.25 = 12.5 km.
This means that the steamer passes 12.5 km in 1/4 hour.

Method 2.
1 hour = 60 minutes,
1/4 hour = 60: 4 = 15 minutes.
60:15 = 4, which means that 15 minutes is 4 times less than 1 hour. This means that the steamer will cover the distance 4 times less in 15 minutes at the same speed.
50: 4 = 12.5 km.
Answer: 12.5 km.