Question

A car moves for half of it's total travel time
with a speed 80 kolh and for next half of the
time at 40 kmlhr. The total distance covered is 60km.
find the average speed of the car.​

Answer 1

We are given

$V=40Kmph\\U=60Kmph\\s=60km$

Let us use the formula (since displacement has nothing to do here)

$V_{avg}=\frac{V-U}{2}$

      $=\frac{40+60}{2} \\=100/2=50Kmph$

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