In the puzzle Four people on a Bridge we met four people who needed to cross a bridge at night. In this puzzle, there are five people who must cross two sequential bridges at night. As in the original puzzle, there are some hindrances:

The bridges can only support two people crossing at a time.

Each person has a different speed in which they can cross: 10 minutes, 7 minutes, 5 minutes, 2 minutes, and 1 minute.

They have only two flashlights to share among them.

What is the shortest amount of time it will take for all five people to cross both bridges?

I got 32 mins, if the times given for crossing are for one bridge.

Edited on June 25, 2005, 3:22 am

Edited on June 25, 2005, 3:43 am

Posted by Sachin on 2005-06-25 03:21:15