A cyclist rides uphill from the village to a hill fort at 15 km/h and comes back down the same road at 35 km/h. What is the average speed for the whole round trip, in km/h?

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Accepted Answer

21. For equal distances, average speed = 2 × 15 × 35 ÷ (15 + 35) = 1050 ÷ 50 = 21 km/h.

A cyclist rides uphill from the village to a hill fort at 15 km/h and comes back down the same road at 35 km/h. What is the average speed for the whole round trip, in km/h?

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