Question

A body covers first one third of the distance with a velocity 20m/s,the second one -third distance with a velocity of 30m/s and last one-third distance with a velocity 40m/s.The average velocity nearly is

Answer 1

Answer:

360m/13s

Explanation:

let total displacement is 3x meters

total time taken=(x/20+x/30+x/40) sec

av.velocity = total displacement/total time taken

=3x/13x/120

=360x/13x

=360/13 m per sec