The cyclist traveled half of the way in 2 hours at a speed of 15 km / h and the rest of the way 10 km / h

The cyclist traveled half of the way in 2 hours at a speed of 15 km / h and the rest of the way 10 km / h how long the cyclist was on the way.

1) Find how many kilometers are half the way.
We multiply the speed of the cyclist in a given section by the time he spent on the movement.
15 * 2 = 30 km.
2) Find the time that the cyclist was on the road in the second half.
We divide 30 km by the speed of the cyclist on this section.
30/10 = 3 hours.
From this it follows that the cyclist was on the way:
2 + 3 = 5 hours.
Answer: The cyclist was on the road for 5 hours.