Question

3. Express a speed of 20 m per sec, in km per hour.
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Answer 1

Answer:

20 seconds equals to 72 kilometre per hour

Answer 2

Step-by-step explanation:

To convert m/s into km/h, simply multiply it with 18/5

So,

$\frac{20m}{s} = 20 \times \frac{18}{5} = 4 \times 18 = 72km |hr$

72km/h