Asked by minni

an aeroplane takes 40 minutes less to fly 3600km with the wind blowing at 30 km/hr than the time it takes to fly against the same wind .Find the actual speed of the aeroplane when there is no wind.
Answered by Steve
if the speed is s,

3600/(s+30) = 3600/(s-30) - 2/3
s = 570
Answered by bosa
570
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