The first two hours the skier walked at a speed of 18 km / h, then 2 hours at a speed of 15 km / h and another 2 hours

| January 15, 2021 | education

The first two hours the skier walked at a speed of 18 km / h, then 2 hours at a speed of 15 km / h and another 2 hours at a speed of 12 km / h. What distance did the skier go? How fast a skier must move to cover this distance in 5 hours.

1. We calculate the length of the section of the path where the skier walked at a speed of 18 km / h:
18 x 2 = 36 kilometers.
2. We calculate the length of the section of the path where the skier walked at a speed of 15 km / h:
15 x 2 = 30 km.
3. We calculate the length of the section of the path where the skier walked at a speed of 12 km / h:
12 x 2 = 24 km.
4. We calculate the total distance traveled by the skier:
36 + 30 + 24 = 90 km.
5. We calculate the speed with which a skier must go to cover 90 km in 5 hours:
90: 5 = 18 km / h.
Answer: the speed of the skier should be 18 km / h.



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