A train has to cover a distance of 120 km in 10 hours. If it covers half journey in 3/5^{th} time, then the speed of covering the remaining distance in the time left has to be:

Speed = Distance/time = 120/10 = 12 km/hr According to the question, New time = 3/5 x 10 = 6 hrs New distance = 1/2 x 120 = 60 km Required speed = Distance left/Time left = 60/4 = 15 km/hr

- The speed of a bike increases by 4 km/hr after every 1 hour. If the distance travelled by the bike in 1st hour is 27 km, the find the total distance travelled by the bike in 11 hours.
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- An Aeroplane flies along a Square field @ 75, 100, 150 and 200 km/hours respectively. Then find the Average speed of the Aeroplane during the whole journey?
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