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 4x km.	Options:
A) 16
B) 18
C) 32
D) 19
E) 12
Total time taken = x/40 + 2x/20 hours   = 5x/40 = x/8 hours   Average speed = 4x/(x/8) = 32 kmph   Answer: 32
<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 4x km.