Question

A boy goes from home to school covering a distance of 500km in 2 hours
and comes back home along the same path in 3 hours. What is the average
speed of his entire journey?

Answer 1

Step-by-step explanation:

Let the distance between the school and the house is x km

Speed of the boy from house to school =20 km/hr.

Using formula, Time taken =

speed

distance

.

So, time taken =

20

x

hours.

Also,Speed of the boy from school to the house =30 km/hr

So, time taken =

30

x

hours.

Total time taken =

20

x

+

30

x

=

12

x

hours

Also total distance covered by boy =x+x=2x km.

Using formula,

Average speed =

Totaltime

Totaldistance

=

12

x

2x

=24 km/hr.

Thus, average speed of the boy's journey is 24 km/hr.