Nick took a bus from home to market, that travels at 80 kmph. While walking back at 8 kmph,
halfway through, he suddenly realized he was getting late and he cycled back the remaining distance in 60 kmph. Find the average speed.  Choose the correct answer:	A) 49.5 kmph	B) 49.0 kmph	C) 48.5 kmph	D) 48.0 kmph	E) none of these
Let the distance be 2x(one way)   Time taken by bus = 2x/80, by walking =x/8, by cycling = x/60 hours   :. Average speed = Total 48.0 kmphistance/Total time   = 8x / x/40 + x/8 + x/60   = 8 *60 / 1.5+7.5+1   = 12.0   ANSWER:48.0 kmph
<result>D</result>
Nick took a bus from home to market, that travels at 80 kmph. While walking back at 8 kmph,
halfway through, he suddenly realized he was getting late and he cycled back the remaining distance in 60 kmph. Find the average speed.