Question

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

Answer 1

Answer:36km/h

Explanation:Assuming the total distance to be 3x.

Time taken by the car to cover one-third of the distance = x/20

Time taken to cover two-thirds of the distance by the car = 2x/60

= x/30 Total time taken by the car

= x/20 + x/30 equals to 5x/60 which is x/12

Average speed obtained= (Total distance travelled)/(Total time taken)

= (3x)/(x/12) = 36 kilometre/hour

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