A trained covered x km at 40 kmph and another 2x km at 20 kmph. Find the average speed of the train in covering the entire 6x km.	Select:	A) 40kmph	B) 45kmph	C) 48kmph	D) 50kmph	E) 55kmph
Total time taken = x/40 + 2x/20 hours   = 5x/40 = x/8 hours   Average speed = 6x/(x/8)   = 48 kmph   Answer:48kmph
<result>C</result>
A trained covered x km at 40 kmph and another 2x km at 20 kmph. Find the average speed of the train in covering the entire 6x km.