A trained covered x km at 30 kmph and another 2x km at 20 kmph. Find the average speed of the train in covering the entire 3x km.	Choose the correct choice
A) 20kmph B) 22.5kmph C) 25kmph D) 30kmph E) 35kmph
Total time taken = x/30 + 2x/20 hours   = 8x/60 = 2x/15 hours   Average speed = 3x/(2x/15)   = 22.5 kmph   Answer:22.5kmph3 /(2 /15)= 
<gadget id="calculator">3 /(2 /15)</gadget>
<output>45/2 = around 22.5</output>
22.5 kmph   Answer:22.5kmph
<result>B</result>
A trained covered x km at 30 kmph and another 2x km at 20 kmph. Find the average speed of the train in covering the entire 3x km.