a body travels a certain distance with a speed of 60km/h and returned back with a speed of 40km/h find the average speed in km per hour and in m per second
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2×r1×r2/r1+r2
i.e.,2×60×40/100
48km/h
or120/9meter per sec.
i.e.,2×60×40/100
48km/h
or120/9meter per sec.
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