A boy walks at a speed of 4km/h.how much time in second does he take to walk a distance of 20 km
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Answered by
8
Explanation:
time=distance/speed
=20/4h
=5h
5h=5×60×60
=18000sec
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Answered by
2
Speed of boy in km/h
= 4km/h
Speed of boy in m/s
(1 km = 1000m, 1 hr = 3600 seconds)
=(4×1000)/(1×3600)
= 4000km/3600sec
= 1.1m/s
Distance given in km = 20km
Now,Distance in metre = 20×1000= 20000m
We know, time = distance/speed
Now, time = 20000/1.1
Time = 18000 seconds
Therefore, he will take 18000 seconds.
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