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Introduction to Speed

A person cros...

Question

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

A

3.6

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B

7.2

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C

8.4

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D

10

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Solution

The correct option is C 7.2
Speed= $(\frac{600}{5 \times 60})$ m/sec.
= 2 m/seec.
Converting m/sec to km/hr (see important formula section)
$(2 \times \frac{18}{5})$ km/hr
=7.2 km/hr.

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