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Express 2 m per second in $\frac{km}{h}$

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26 \frac{km}{h}

36 \frac{km}{h}

31 \frac{km}{h}

29 \frac{km}{h}

answer is B.

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Detailed Solution

Concept: The conversion of one unit into another is based on some basic and standard values. Here in this question, we are supposed to convert speed from kilometer per hour into meter per second. For this we are applying basic conversion standards

1 km = 1000 m

1 m = \frac{1}{1000} km

1 m = 60 \sec

1 \sec = \frac{1}{60} \min

1 h = 60 \min

1 h = 60 \times 60

1 h = 3600 \sec

Now,

2 \frac{m}{\sec} = 2 \times \frac{18}{5}

= 36 \frac{km}{h}

Hence, the correct option is 2)

36 \frac{km}{h}

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