Question

19. A body moving along straight line covers a distance
in three equal parts with speed 2 m/s, 3 m/s and
4 m/s, then its average speed is
(1) 12 m/s​

Answer 1

Explanation:

t1=s/6

t2=s/9

t3=s/12

average velocity= s/(s/6 + s/9 +s/12)

Answer 2

Explanation:

Average Speed=v1+v2+v3/3=2+3+4/3

=9/3

=3m/s