Question

convert 6 m/sec into km/ hr

Answer 1

6m= 0.006km
1 sec= 1/3600
so 6m/sec=0.006/1/3600=0.006×3600=21.6km/hr(Ans)
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Answer 2

When you convert m/sec to km/hr you multiply it by 18/5 and when you wanna do the opposite you multiply by 5/18

Proof - 1 km = 1000m
1 hr = 3600 sec
1 km/hr = 1 x 1000/3600
= 10/36 = 5/18 m/s

$6 \times \frac{18}{5}$

$= \frac{108}{5}$

$= 21.6$

Ans : 21.6 km/hr