I walk a certain distance and ride back taking a total time of 37 minutes. I could walk both ways in 55 minutes. How long would it take me to ride both ways?
Choose the correct choice from the following answers:
A) 10 min  B) 12 min  C) 20 min  D) 19 min  E) 24 min
Let the distance be x km. Then,   ( Time taken to walk x km) + (time taken to ride x km) =37 min.   ( Time taken to walk 2x km ) + ( time taken to ride 2x km )= 74 min.   But, the time taken to walk 2x km = 55 min.   Time taken to ride 2x km = (74-55)= 
<gadget id="calculator">(74-55)</gadget>
<output>19</output>
19 min.   ANSWER 19 min
<result>D</result>
I walk a certain distance and ride back taking a total time of 37 minutes. I could walk both ways in 55 minutes. How long would it take me to ride both ways?