Puzzle of the day: 144
4 people take different time to cross the bridge and only 2 at a time can cross it, and move at the speed of slower person. They need to use a torch to cross the bridge. There is only one torch with them. Time taken by them is given below
A- 1 min
B- 2 min
C-5 min
D-8 min
Find the minimum time taken by them to cross it.
- 16 min
- 17 min
- 15 min
- 18 min
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