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John covers a distance by driving a car at 60 kmph and he returns back to the starting point on the scooter at 40 kmph. Find the average speed for the

whole journey. A. 48 kmph B. 50 kmph C. 51 kmph D. 54 kmph


Average speed = ( 60 + 40 )/2 = 100/2 = 50Kmph . So, option (B) is the correct answer.
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Let distance be x
total distance is 2x
time for going=x/60
time taken for returning=x/40
total time=(x/60)+(x/40)
avg speed=total dis./ total time
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