A cyclist and a motorcyclist left points A and B at the same time towards each other. How many minutes will

A cyclist and a motorcyclist left points A and B at the same time towards each other. How many minutes will the cyclist meet with the motorcyclist if it takes 20 minutes for the motorcyclist to travel from A to B?

Let x be the speed of the cyclist, then the speed of the motorcyclist will be 4 * x.

First action:

4 * x * 20 = 80 * x – all the way from point A to point B.

Second action:

x + 4 * x = 5 * x – speed of convergence of a cyclist and a motorcyclist.

Third action:

80 * x / 5 * x = 16 (minutes) – the time after which the cyclist meets the motorcyclist.

Answer: In 16 minutes the cyclist will meet with the motorcyclist.