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A boy runs 20 km in 2.5 hours. How long will he take to run 32 km at double the previous speed ?

A2.5 hours

B5 hours

C2 hours

D4 hours

Answer:

C. 2 hours

Read Explanation:

Speed = distance/time speed of boy = 20 kms/(2.5 hrs) ⇒ 8 km/hr If the speed is doubled the new speed will be = 8 × 2 = 16 km/hr Then the time taken by the boy to run 32 kms Time = Distance/speed time = 32/16 ⇒ 2 hours

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