2. Four persons can cross a bridge in 3,7,13,17 minutes. Only two can cross at a time. find the

minimum time taken by the four to cross the bridge.

ans:20

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- March 6th 2006, 08:18 PMbharathleceanother puzzle
2. Four persons can cross a bridge in 3,7,13,17 minutes. Only two can cross at a time. find the

minimum time taken by the four to cross the bridge.

ans:20 - March 7th 2006, 01:43 PMThePerfectHackerQuote:

Originally Posted by**bharathlece**

2)After 13 min, 13-guy finished and 17-guy walked for 13 min, there is room for another.

3)Now send the 7 minute guy.

4)After 4 min, the 17-guy finished and 7-guy waled for 4 min, there is room for another.

5)Send the 3 minute guy.

6)After 3 minutes both the 3 and 4 guys finished on time.

In total 20 minutes where used. - March 7th 2006, 07:33 PMbharathlecethanku man
hi, thanks for giving me replay.