Question

A student walks to his school which is at a distance of 3 km from his home in 30 minutes. On reaching the

finds that the school is closed and comes back by a bicycle with friend and reaches home in 20 minutes.

His average speed in km/h is

Answer 1

Answer:

7.2

Boojho Home to school to again home

From home to school distance is 3 km time taken is 30 min = (30/60) hour = 0.5 hour

And in returning from school to home time taken = 20 min = (20/60) hour = 0.33 hour

average speed = Total distance / time taken

= (3 + 3)/(0.5 + 0.33) km/h

= 7.2 km/h

Answer 2

Total distance covered = 3 + 3 = 6km

Time = 30 + 20 = 50minutes

Average speed = 2 m/s²