A car goes 20 metres in a second. Find its speed in km/hr.

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Question

A car goes 20 metres in a second. Find its speed in km/hr.

Options:

A . 20

B . 36

C . 72

D . 18

Answer: Option C
Answer: (c)1 m/sec = $18/5$ kmph20 m/sec = ${20 × 18}/5$= 72 kmph

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