A postman riding a bicycle at 15 km/h can reach a village in 4 hours. If he is delayed by 1 hour at the
start, then in order to reach his destination in time, he should ride with a speed of :
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Answer:
Given speed =15 km/h
Time = 4hrs.
total distance = ?
Distance = speed x time
15 x 4 = 60
Delayed by 1 hrs.
Average speed = 60/3 = 20 km/h.
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