Q. A car travels half the distance with constant velocity of $40\ kmph$ and the remaining half with a constant velocity of $60\ kmph$. The average velocity of the car in $kmph$ is
A) 40
B) 45
C) 48
D) 50
Explanation
(c) $v_{av} = \frac{2v_{1}v_{2}}{v_{1} + v_{2}} = \frac{2 \times 40 \times 60}{100} = 48\ kmph$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.