DISTANCE BETWEEN TWO PLACES IS 120 KM A CAR TRAVELLING AT A CERTAIN SPEED CAN COVER THE DISTANCE IN 2 HOURS 30 MINUTES .BY HOW MANY KM/H SHOULD THE SPEED OF CAR BE IN CREASED FOR IT TO THE 30 MINUTES LESS TO COVER THE DISTANCE.
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If you cover 120km in 2 hrs 30 minutes, your average speed must be 120 / 2.5 = 48 km/hr. Obviously to “do it 30 minutes faster” would be 2 hours flat not 2 hrs 30 minutes. 120km in 2 hours is 120/2 = 60 km per hour.
The difference between the two, 60km and 48 km is 12.
Drive 12KPH faster to cover the same distance in 30 minutes less time
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