Question

a boy runs a distance of 20km in 2hrs, what is the speed of the boy?

Answer 1

Boy runs a distance of 20 km in 2.5 hrs.

speed of boy

=20kms52hrs{Time=DistanceSpeed}

= 8 km/hr

If the speed is doubled the new speed will be

=8×2=16km/hr

then the time taken by the boy to run 32kms

time=3216=2hrs

{Time=DistanceSpeed}

Answer 2

Answer:

Boy runs a distance of 20 km in 2hrs.

speed of boy

=20kms/2hrs{Time=DistanceSpeed}

= 10 km/hr

If the speed is doubled the new speed will be

=10×2=20km/hr

then the time taken by the boy to run 20kms

time==2hrs

{Time=DistanceSpeed}