Question

A body covers first one-third of the distance with a
velocity 10 ms-1 in same direction, the second
one-third with a velocity 20 ms- and last one-third
with a velocity of 30 ms-1. The average velocity of
body is
(1) 17.8 ms -1 (2) 16.4 ms-1
(3) 18.3 ms-1 (4) 20.2 ms-1​

Answer 1

Answer:

(2)

Explanation:

Average velocity is total displacement / total time

if total displacement be x

total time is x/30 + x/60+x/90 =11x/180

x/11x/180 = 16.6 m/s