Question

A body travel have distance at 12 m\s and other half with 18m\s .calculate avg speed

Answer 1

let total distance be 2d

then for first half the time is

t1=d/12

for 2nd half the time is

t2=d/18

total time taken=t1+t2=d/12+d/18=5d/36

total distance=2d

average speed=total distance/total time taken

=2d/5d/36

=36*2/5

=14.4m/s