Jake took a bus from home to market, that travels at 10 kmph. While walking back at 2 kmph,
halfway through, he suddenly realized he was getting late and he cycled back the remaining distance in 50 kmph. Find the average speed.
Choose the most appropriate option:
A) 1.17 kmph
B) 1.67 kmph
C) 0.69 kmph
D) 1.45 kmph
E) none of these
Let the distance be 2x(one way)   Time taken by bus = 2x/10, by walking =x/2, by cycling = x/50 hours   :. Average speed = Total Distance/Total time   = 2x / x/5 + x/2 + x/50   = 2 *60 / 12+30+1.2   = 1.67   ANSWER:1.67 kmph
<result>B</result>
Jake took a bus from home to market, that travels at 10 kmph. While walking back at 2 kmph,
halfway through, he suddenly realized he was getting late and he cycled back the remaining distance in 50 kmph. Find the average speed.