A car moves for half of its time at $80 K m / h r$ and for rest of time $40 K m / h r$ . If total distance covered is $60 K m,$ the average sped of the car is:

120 K m / h r

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100 K m / h r

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80 K m / h r

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60 K m / h r

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Solution

The correct option is D $60 K m / h r$
Let the total time be $= T$ distance travelled in $T / 2 = [80 \times \frac{T}{2}] m$
Distance travelled in another $T / 2 = [40 \times \frac{T}{2}] m$
Total distance $= 40 T + 20 T = 60 T$
Total time $= T$
${\to V}_{A v g} = 60 \frac{T}{T} = 60 K m / h$

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Similar questions

A car moving on a straight road covers one third of the distance with 20 km/hr and the rest with 60 km/hr. The average speed is

160 k m

40 k m / h r

120 k m

60 k m / h r

A car moves for half of the total time of travel at 80 km/h and for rest half of the time at 40 km/h.

If the total distance covered is 60 km, what is the average speed of the car?

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