Ragav took a bus from home to market, that travels at 40 kmph. While walking back at 4 kmph, halfway through, he suddenly realized he was getting late and he cycled back the remaining distance in 30 kmph. Find the average speed.
52 kmph
20 kmph
6.5 kmph
12.0 kmph
Explanation:
Let the distance be 2x(one way)
Time taken by bus = 2x/40, by walking =x/4, by cycling = x/30 hours
:. Average speed = Total Distance = 4x = 4 *60 = 12.0
Total time x/20 + x/4 + x/30 = 3+15+2
Let the distance be 2x(one way)
Time taken by bus = 2x/40, by walking =x/4, by cycling = x/30 hours
:. Average speed = Total Distance = 4x = 4 *60 = 12.0
Total time x/20 + x/4 + x/30 = 3+15+2