Aakshi run 500 metres in 100 seconds. Find the speed in km per hour.
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Distance = 500 m
Time = 100 s
Speed = distance / time
==> 500 m / 100 s
But 500 m = 500 /1000 km
= 0.5 km
100 s
Now 1 s = 1 / 60 minute
= 1 / ( 60 * 60) hr
1/3600 hr
100 s is 100 / 3600 hr
==> 1 / 36 hr
So speed
==> 0.5 / 1 / 36 km/hr
==> 36 * 0.5 km / hr
==> 18 km/hr
The speed is 18 km / hr
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