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 5x km. Choose the correct choice from the following answers: A) 20kmph B) 25kmph C) 30kmph D) 35kmph E) 40kmph
Total time taken = x/40 + 2x/20 hours   = 5x/40 = x/8 hours   Average speed = 5x/(x/8)   = 40 kmph   Answer:40kmph
<result>E</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 5x km.