A car moving on a straight road covers one third of the total distance with 20km/h and the remaining distance with 60km/h what is the average speed of the car
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Let the total distance be 3x.
Time taken to cover one-third of thedistance = x/20
Time taken to cover two-thirds of the distance = 2x/60 = x/30
Total time = x/20 + x/30 = 5x/60 = x/12
Average speed = d/t = (3x)/(x/12) = 36 km/hr...
hope this will help.
Time taken to cover one-third of thedistance = x/20
Time taken to cover two-thirds of the distance = 2x/60 = x/30
Total time = x/20 + x/30 = 5x/60 = x/12
Average speed = d/t = (3x)/(x/12) = 36 km/hr...
hope this will help.
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