Question

Qo Ritik travels with a constant speed of 18 km/h
for 10 seconds, Then he travels with a constant
speed of 72km per hour for 20 seconds and
reaches at his destination Calculate
a) Average speed during his journey (m/s)
b) average velocity if he returns with constant
speed of 36 km/h in 40s.
​

Answer 1

Answer:

Explanation:

average speed=u+v/2

                        =18+72/2

                        =80/2

                        =40km/h

                        =40*18/5

                        =18*8

                        =144m/s