Question

3. Abdul while driving to schools.computes
the average speed for his trip to be
20km/h. On his return trip along the
same route there is less traffic
and
the average speed is 30 km/h. What is
the average speed for Abdul's 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

hope this answer helps u.....