Question
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.
Answers
if the speed is s,
3600/(s+30) = 3600/(s-30) - 2/3
s = 570
3600/(s+30) = 3600/(s-30) - 2/3
s = 570
570
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