Abdul while driving to school computes the average speed

Asked by admin @ 11/08/2021 in Science viewed by 2256 People

Abdul while driving to school computes the average speed for his trip to be 20 km per hour on his return trip along the same route there is less traffic and average speed is 30 km per hour what is the average speed for Abdul strip

Answered by admin @ 11/08/2021

Let the dist. be x
dist. while going = dist while returning
time = dist./speed
so, time while going = x/20
time while coming =x/30
total time= x/20+x/30
=(3x+2x)/60
=5x/60
=x/12
total dist.= 2x
avg. speed = total dist./total speed
=2x*12/x
=24km/hr

Answered by shafaet7 @ 25/09/2021

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