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 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
$40$
$60$
$48$
$50$
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
${v_{av}} = \frac{{2{v_1}{v_2}}}{{{v_1} + {v_2}}} = \frac{{2 \times 40 \times 60}}{{100}} = 48\,kmph.$
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