First A and B went , they took = 2 mins A came back = 1 min A and C crossed , took = 5 mins A came back = 1 min A and D crossed finally = 10 mins _______________________________ Total = 10 + 1 + 5 + 1 +2 = 19 mins ? Reply

Deep, that seems a reasonable solution. We’ll find out in the next post if it can be improved or not ðŸ™‚ regards J Reply

Umm, Reduced it a bit to 17 mins, A and B went = 2 mins A comes back = 1 min C and D passes with taking the torch from A = 10 mins B comes back to take A = 2 mins A and B passes finally = 2 mins —————————————————————– 17 mins total, can it be reduced further? Reply

First A and B went , they took = 2 mins

A came back = 1 min

A and C crossed , took = 5 mins

A came back = 1 min

A and D crossed finally = 10 mins

_______________________________

Total = 10 + 1 + 5 + 1 +2 = 19 mins ?

Deep, that seems a reasonable solution. We’ll find out in the next post if it can be improved or not ðŸ™‚

regards

J

Umm, Reduced it a bit to 17 mins,

A and B went = 2 mins

A comes back = 1 min

C and D passes with taking the torch from A = 10 mins

B comes back to take A = 2 mins

A and B passes finally = 2 mins

—————————————————————–

17 mins total, can it be reduced further?

Probably not… >:)

regards

J

17 min