#### Let the total distance travelled by the body is 2s.If t1 is the time taken by the body to travel first half of the distance ,then

t1=S2

Let t2 be the time taken by the body for each time interval for the remaining hal journey.

S=3t2+5t2=8t2

So, average speed =totaldistancetravelledtotaltimetaken

=2St1+2t2

=2SS2+S4

=83ms−1