1.  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 ?
A. 11 min
B. 19 min
C. 23 min
D. 37 min

Answer: Option B

Explanation:

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, time taken to walk 2X km = 55 min
∴ Time taken to ride 2X km = (74 - 55) = 19 min.