Question

Boojho walks to his school which is at a distance of 3 km from his home in 30 min. On reaching, he finds that the school is closed and comes back by bicycle with his friend and reaches home in 20 min. His average speed in km/h is?
Options
a. 8.3
b. 7.2
c. 5
d. 3.6

Answer 1

Answer:

The average speed of Boojho is 7.2km/hour.

Explanation:

The formula for finding average speed is = Total distance/Total speed

Total distance = 3+3 = 6km ( up and down)

Total time = 30 +20 minutes = 50/60 hours ( up and down)

So, the average speed is =( 6*60)/50 = 36/5 = 7.2 km/hour( or 2m /sec).

The average speed of Boojho is 7.2km/hour.

Answer 2

This is physics not maths plus answer is 7.2 simple physics of class 7