[Easy] Peter and John need to use 6 days to complete some work. John and Lucas need 9 days to finish it, and Peter and Lucas need 15 days to finish it. How many days do they have to use if they do the work together?

Question

lollylau · Answer

anyone?

lollylau · Answer

They're still busy doing the previous one.
"sigh"

anonymous · Answer

this is a set of diophantine equations right

anonymous · Answer

You can do it using time and work formula.

lollylau · Answer

get three people named Peter, John and Lucas and start :)

anonymous · Answer

work = work/time * time?

anonymous · Answer

alright in Python I will create Peter, John, and Lucas objects and see how long they take to do the thing

anonymous · Answer

Do you need to use python for EVERYTHING?

lollylau · Answer

easy solution below.

lollylau · Answer

Peter = p
John = j
Lucas = l
p+j = 1/6
j+l = 1/9
p+l = 1/15.

lollylau · Answer

add p, j, and l and find the reciprocal.

anonymous · Answer

Yeah, I knew that, just too lazy to work it out.

anonymous · Answer

yea it is a bunch of arithmetic 
$$\frac{180}{31}$$ i think

lollylau · Answer

nice! you got it correct.

mertsj · Answer

Of course he did.

anonymous · Answer

my arithmetic somethings fails me though

lollylau · Answer

namely careless.