Thread: Problem Solving

Harry, Annie and Mitch decided to paint the living room. Harry could paint the room by himself in 3 hours. Annie could do it in 4 hours and Mitch would take 6 hours on his own. If they all work together and dont get in each others way, how long will the job take?

Originally Posted by not happy jan

Harry, Annie and Mitch decided to paint the living room. Harry could paint the room by himself in 3 hours. Annie could do it in 4 hours and Mitch would take 6 hours on his own. If they all work together and dont get in each others way, how long will the job take?

Since Harry can paint the room in 3 hours he can paint the of the room in 1 hour.

Using the same argument for the other's we get

Annie of the room in 1 hour

Mitch of the room in 1 hour

Now we can add the rates that each of them work



Simplifying we get

so it will take them One and one thirds hours or 1 hour and 20 min.

I hope this helps.

Why are you not happy, Jan?

Originally Posted by not happy jan

Harry, Annie and Mitch decided to paint the living room. Harry could paint the room by himself in 3 hours. Annie could do it in 4 hours and Mitch would take 6 hours on his own. If they all work together and dont get in each others way, how long will the job take?

just add their rates. let painting the living room be the job

for Harry, he does

Annie does

Mitch does

together they can do: that is,

EDiT: Thanks a lot, TES you look different with long hair