LOGIC QUESTION

Today, I read an advertising with a title ‘Do You Want To Work in Google ?’ and under this topic, there were many logic questions asked in its interviews. At first sight, one of them seemed to be solvable:

There are four people who have to pass beyond a rope bridge at night. But they have only one torch and its battery will be exhausted in 17 minutes. On the other hand, the bridge is not hardy to allow more than two persons to pass and also without torch. The people have different speeds. One passes in 1 minute, other one in 2 minutes, the third one in 5 minutes and the slowest one in 10 minutes. How can it be?

This one is not hard to solve, I tried and was successful