From point A to point B, the car drove at a speed of 60 km / h, and returned at a speed of 90 km / h.

From point A to point B, the car drove at a speed of 60 km / h, and returned at a speed of 90 km / h. In total, he was on the road for 5 hours. How long did the car drive from point A to point B?

If the speeds on the first and second sections of the path are related as 60: 90, then the time on the same sections is related as 90: 60.

1) 90: 60 = 90/60 = 3/2 (times) ratio of time.

The total time is divided into 5 parts:

– 3 parts of them – the first section;

– 2 parts – the second section.

2) 3 + 2 = 5 (parts) divided by time.

The total time is 5 hours and is divided into 5 parts. So 1 part is equal to 1 hour:

3) 5: 5 = 1 (h) is one part.

The first section (from A to B) is 3 parts:

4) 3 * 1 = 3 (h) went from A to B.