You have 5 segments of a chain and you want to connect them together into one chain. It costs 5 cents to break a link, and 10 cents to weld it back together. What is the least it would cost to join the 5 segments together?
In a row, I break and weld the second and fourth segments.
This costs \(2\times (5\ Cents+10\ cents)=30\ cents\)
I am confused by your logic asinus.
I think it will cost 60cents (4 connections needed.)
I am assuming that when you break a link you can then use it to join to another section.
I break a chain link and connect three chain links with it Melody.
O O O O O
HERE ARE THE FIVE CHAINS
XXXXXX XXXXXX XXXXXX XXXXX XXXXX
I need to break 4 end links and use them to join the pieces back up
XX X XXXXXX X XXXXXX X XXXXX X XXXXX 15*4=60c
Of course if one small chain has less than 4 links then less joins will be needed.
If the shortest one is only 3 links then
XXX XXXXXX XXXXXX XXXXX XXXXX
XXXXXX X XXXXXX X XXXXX X XXXXX 15*3=45c
If the two shortest ones have 2 links each then
XX XX XXXXXX XXXXX XXXXX
X X XXXXXX X XXXXX X XXXXX 15*3=45c still 45cents
The question is poorly worded.
Is the end result a single piece of chain in which all but the first and last link are joined to only two other links,
and the first and last link joined to only one other link, or not?
If not. Break one link, attach all the pieces of chain at that link and reweld it. Fifteen cents.
If so, Melody's solution above is correct.