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\times60}\right)$m/sec.
= 2 m/sec.
Converting m/sec to km/hr
= $\left(2\times\dfrac{18}{5}\right)$km/hr
= 7.2 km/hr.
Speed =$ \left(\dfrac{600}{5\times60}\right)$m/sec.
= 2 m/sec.
Converting m/sec to km/hr
= $\left(2\times\dfrac{18}{5}\right)$km/hr
= 7.2 km/hr.