Question

# By walking at 34 the of his usual speed, a man reaches office 20 minutes later than usual. How much time he usually take?

A

30 min

B

60 min

C

70 min

D

50 min

Solution

## The correct option is B 60 min Take initial variables as Distance d, velocity v and time t. Modifying according to the current situation. Equating distances (because distance is same for both the cases). ⇒(0.75=34) ⇒(0.75v)×(t+20)=v×t ⇒3t+60=4t                        ⇒t=60 min Physics

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