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A person crosses a 600 m long street in 5 minutes. What is his speed in km per hour?

A. 3.6

B. 7.2

C. 8.4

D. 10

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Correct Answer : B.


Speed = 6005×60 m/sec.
= 2 m/sec.
Converting m/sec to km/hr 
= 2 x 185 km/hr
= 7.2 km/hr.

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