Puzzles - Answer

Answer 3

Crossers    Direction    People Across    Total Time
    
1 + 2 ----> 1 + 2 2 mins
1 <---- 2 3 mins
5 + 10 ----> 2 + 5 + 10 13 mins
2 <---- 5 + 10 15 mins
1 + 2 ----> 1 + 2 + 5 + 10 17 mins