train travel?

A train travels at a constant rate of speed. It reaches a stretch of track that has 15 poles. The poles are placed at equal distances to each other. It takes the train 10 minutes to travel from the first pole to the tenth pole. How long will it take the train to reach the fifteenth pole?

10/9 * 14

The answer should be 15 5/9 min or 15 min 33.3333333... s.

Many people may get 15 min as they will do 10/10 * 15 instead, thinking that there's 15 spaces in between each pole when there are only 14.

The train travels from pole to pole.
There are 9 pole-to-pole to reach the 10th pole.
9 pole-to-pole in 10 minutes
1 pole-to-pole in 10/9 minutes
14 pole-to-pole in (10/9)(14)=140/9 =15.55 minutes
14 pole-to-pole to reach the 15th pole.