Question

A boy goes from his house to school on bicycle. The distance between his house and school is 5 kilometre. He covers this distance in 1 hour while going to school and 75 minutes while coming back to home. Find his average velocity for the entire journey

Answer 1

Answer:

Explanation:

Hi.

Here is your answer------

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  = distance/speed

So, time taken = x/20 hours.

Also,

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

so, time taken = x/30 hours.

Total time taken = x/20 + x/30

                         = x/12 hours

Also total distance covered by boy = x +x 

                                                       = 2 x km.

Using formula,

Average speed = Total distance/ Total time

                        = 2 x/(x/12)

                        = 24 km/hr.

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

Hope this will help u.

Have a nice day.

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