One car moving on a straight road cover one third of the distance with $20 k m / h r$ and the rest with $60 k m / h r$ . The average speed of the car is
$36 k m / h$
$80 k m / h$
$40 k m / h$
$46 \frac{2}{3} k m / h$

Question

One car moving on a straight road cover one third of the distance with 20 km-hr and the rest with 60 km-hr- The average speed of the car is36 km-h80 km-h40 km-hdisplaystyle 46dfrac-2-3- km-h

Toppr Admin · Accepted Answer

Let 3d-xA0-km be total distance-Time taken for first one third t1-d20-xA0-hr

One car moving on a straight road cover one third of the distance with 20 km/hr and the rest with 60 km/hr. The average speed of the car is36 km/h80 km/h40 km/h4623 km/h

Let 3d km be total distance.Time taken for first one third t1=d20 hr

One car moving on a straight road cover one third of the distance with $20 k m / h r$ and the rest with $60 k m / h r$ . The average speed of the car is
$36 k m / h$
$80 k m / h$
$40 k m / h$
$46 \frac{2}{3} k m / h$

Let $3 d k m$ be total distance.
Time taken for first one third $t_{1} = \frac{d}{20} h r$