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contestada

A helicopter flies 168 miles against the wind in 2 hours; with the wind, it can
fly 252 miles in the same amount of time. Find the speed of the helicopter in still air.

Respuesta :

Answer:

105 mile/hour

Step-by-step explanation:

(H - W) x 2 = 168    against wind, speed = helicopter - wind

(H + W) x 2 = 252

H - W = 84    against wind, speed = helicopter - wind

H + W = 126

2H = 84 + 126 = 210

H = 105

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