1.

To ropavci ICHIA car is moving on a straight road covers one third of the distance with a speed of 20 km/h and the rest witha speed of 60 km/h. The average speed of the car is(1) 40 km/h(2) 50 km/h(3) 36 km/h(4) 55 km/hLC​

Answer»

Answer:

36 km/h

Explanation:

let the DISTANCE covered with 20km/ph be x then time TAKEN will be x/20 sec

now distance left to be travellex will be 2x and time taken will be 2x/60 sec

so total distance covered will be 3x and total time taken will be x/12 sec

so average VELOCITY will be total distance travelled /total time taken

therefore average velocity all be 3x/x/12 that will be 36 km/hr.........!!!!!!



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