A helicopter flies 200 miles against the wind in 2 hours, with the wind, it can fly 300 miles in the same amount of time. Find the speed of the helicopter in still air.

Question

Mathematics

America

28 September, 05:43

A helicopter flies 200 miles against the wind in 2 hours, with the wind, it can fly 300 miles in the same amount of time. Find the speed of the helicopter in still air.

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River Chan · Answer 1

Against the wind, the helicopter's speed is (200 mi) / (2 h) = 100 mi/h.

With the wind, the helicopter's speed is (300 mi) / (2 h) = 150 mi/h.

The speed in still air is the average of these, (100 + 150) / 2 mi/h = 125 mi/h.