When a train ride is nonstop, the time of the ride is reduced by 1/3. With stops, the time is 18 hours. How long is the nonstop ride?

Nonstop ride is 12 hours long.

Explanation:

With stopping time taken by train = 18 hours.

Without stopping time is reduced by 1/3.

Time for non stop ride = Time for stopping ride - (Time for stopping ride/3)

= 2 x Time for stopping ride/3

= 2 x 18 / 3 = 12 hours.

So, nonstop ride is 12 hours long.