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A man crosses a 375 m road in 75 sec . His speed (in km/h) is:
Question

A man crosses a 375 m road in 75 sec . His speed (in km/h) is:

A.

15

B.

18

C.

13

D.

20

Correct option is B

Given: 

Distance = 375m

Time = 75 sec 

Formula Used:  

Speed = DistanceTime\frac{\text{Distance}}{\text{Time}} 

m/sec = 185\frac{18}{5} km/h​

Solution: 

Speed = 37575×185=18 km/h\frac{375}{75} \times \frac{18}{5} = 18 \ km/h​​

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