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A Person runs 200 meters in 20 seconds. Whatis his speed in kmph?
Solution
Method 1
Distance = 200 m
Time = 20s
Speed in m/s = (200/20) m/s
= 10m/s
Now Important pointer to remember
5m/s = 18 km/h
So 10m/s = 36kmph Answer
Method 2
20 s for 200m.
1 Hr. (20 x 3 x 60 s) for (200 x 3 x60) m
1 Hr for 36000m
1 Hr for 36 km
Hence speed 36kmph Answer
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