Question 761020
An aeroplane is travelling from A to B which are 100km/h apart and is flying  at the speed of 100km/h with a head wind of 60km/h. What is the ground speed of the aeroplane and how long will it take for the flight to complete?
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Groundspeed = 100 - 60 = 40 km/hr
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d = r*t
t = d/r  = 100/40 hours