Question

Atul walked to his school which is at a distance of 2km from his home in 25mintues.on reaching he found that the school had declared a holiday. He returned home by a bicycle with his friend in 15mintues. Atul's average speed in kn/h was

Answer 1

Step-by-step explanation:

$average \: speed = \frac{total \: distance}{total \: time}$

Atul walked a total distance for 4km (2km when going to school and 2 km when returning home).

He took a total time of 40 minutes (25 + 15) i.e 2/3 hours.

so,

$average \: speed = \frac{4 \: km}{ \frac{2 \: hr}{3} }$

$average \: speed = \frac{12 \: km}{2 \: hr}$

$average \: speed = 6 \: \frac{km}{hr}$