Question

Abdul while driving to school computers the average speed of his trip to be 12 kilometre per hour on return trip along the same route there is a less traffic and average speed is 30 km per hour what is the average speed of Abdul trip

Answer 1

Answer:

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

Explanation:

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