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
Answer: Option B
Explanation:
Speed = [600/(5 x 60)]m/sec.= 2 m/sec.
Converting m/sec to km/hr (see important formulas section)
= [2 x (18/5)]km/hr
= 7.2 km/hr.
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