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What is the correct answer?
4
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
Correct Answer :
B. 7.2
$Speed=\frac{600}{5\times 60}m/sec.$
= 2 m/sec.
Converting m/sec to km/hr
$=\left(2x\frac{18}{5}\right)km/hr$
= 7.2 km/hr.
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