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You are not logged in. #1 20121005 22:54:21
House painting3 friends, Alan, Brian and Chester, paint a house. If Alan had to paint it on his own, it would take him one hour more than the time it would take for all three to paint it together. If Brian had to paint it on his own, it would take him five hours more than the time it would take for all three to paint it together, and Chester 8 hours more. #2 20121006 03:47:59
Re: House paintingI got The limit operator is just an excuse for doing something you know you can't. “It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman “Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment #4 20121006 22:29:41
Re: House paintingLet A, B and C be the hours needed for each friend to paint the house on his own and D the number of hours needed if they paint all together. Last edited by anna_gg (20121006 22:30:20) #5 20121006 22:32:50
Re: House paintingHi; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. #7 20121007 07:30:20
Re: House paintingHi anna_g; In mathematics, you don't understand things. You just get used to them. I have the result, but I do not yet know how to get it. All physicists, and a good many quite respectable mathematicians are contemptuous about proof. 