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A postman riding a bicycle at 15 km/h he...

A postman riding a bicycle at 15 km/h he can raech a village in 4 hours.if he delayed by 1 hour at the start the in order to reach his destination in time,he should ride with a speed of:

A

20 km/h

B

16 km/h

C

14 km/h

D

12 km/h

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The correct Answer is:
A
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