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

3.6
7.2
8.4
10
Explanation:
Speed =$ \left(\dfrac{600}{5 \times 60} \right) $m/sec.

   = 2 m/sec.

Converting m/sec to km/hr => m/sec =$\left(x \times\dfrac{18}{5}\right)$

   =$ \left(2 \times\dfrac{18}{5} \right) $km/hr

   = 7.2 km/hr.

Additional Questions

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