Question

A person walks from his house to office 20km and from there to back home 10km. How much is the total displacement of his journey?​

Answer 1

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.

actually my answer gonna be quite different in the person and boy so you better change that one