Question

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
(2)13/12 m/s
(3)36/13 m/s
(4) 12/13m/s​

Answer 1

Answer:

let distance be x, x, x

let it covers x by speed 2m/s time taken =x/2

as same in all time taken will be x/2,x/3,x/4

now average velocity =total distance/total time

=3x/x/2+x/3+x/4

36/13

Answer 2

36/13m/s
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