Question # A body covers first one-third of the distance with a velocity ( 20 mathrm{ms}^{-1}, ) the second one-third with a velocity of ( 30 mathrm{ms}^{-1} ) and last one-third with a velocity of ( 40 mathrm{ms}^{-1} . ) The average velocity is nearly:

# A body covers first one-third of the distance with a velocity ( 20 mathrm{ms}^{-1}, ) the second one-third with a velocity of ( 30 mathrm{ms}^{-1} ) and last one-third with a velocity of ( 40 mathrm{ms}^{-1} . ) The average velocity is nearly:

(A) ( 28 mathrm{m} / mathrm{s} )

B) ( 38 n )

Solution

Option (A) ( 28 mathrm{m} / mathrm{s} ) .