hasn't been a puzzle for a while

[mic-d]

Not really a woodwork puzzle and it's pretty easy. I build a simple skillion roof 5 sheets of tin wide. The tin covers 762mm. What is the minimum length of gutter I need to buy, ie, what is the width of the roof?

[rwbuild]

3.9m + 1 LH & 1 RH stop end, if no fascia and rafters @ 600 centres, gutter bracket every 2nd rafter, if rafters @ 900 centres, bracket every rafter.
If you have timber fascia brackets 1.0m centres.
Use a 100x75 down pipe or 90mm PVC

[mic-d]

That's right Ray. You get full points for the 3.9m answer. But you lost em all for being a smarty pants and providing all the extra info. Nobody likes an over-achiever these days, it makes the rest of us look bad. It were just a puzzle