Answer:
speed of A is given as 21 m/s and that of B is 72 km/hr
first of all to compare,we need to convert both speeds to same unit's..
here I am choosing m/s
so Speed(A) = 21m/s
so 72 km/hr = 72×5/18 m/s
=20m/s
now clearly speed of A is more
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Answer:
speed of A is given as 21 m/s and that of B is 72 km/hr
first of all to compare,we need to convert both speeds to same unit's..
here I am choosing m/s
so Speed(A) = 21m/s
so 72 km/hr = 72×5/18 m/s
=20m/s
now clearly speed of A is more