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Math problem anyone?! please help me?
Its a story problem.....
A homeowner estimates that it will take 8 days for her to paint her house. A professional painter estimates that he could paint the house in 5 days. How long will it take if they work together?
I got 6.5 but it was wrong... AHHH HELP!
hahahaha Chris, you're right! I'm completely retarded
3 Answers
- LukeLv 68 years agoFavorite Answer
1 / 8 + 1 / 5 = 1 / x
(1 / 8 + 1 / 5)(40) = (1 / x)(40)
(40 / 8 + 40 / 5) = (40 / x)
(5 + 8) = (40 / x)
(13) = (40 / x)
x = (40 / 13)
x = 3.08 hours
- Anonymous8 years ago
The homeowner paints 1/8 of the house in a day and the pro paints 1/5 of the house in a day.
To make them like fractions the homeowner paints 5/40 of the house in a day and the pro 8/40 of a house in a day.
Therefore together in a day they could paint 13/40 of a house in a day.
This makes 3 days of painting by both 39/40 of the house is complete, therefore a little over 3 days to finish the house.
So in 4 days they could complete the house together.
- 8 years ago
Why would it take even longer for the professional to paint the house especially with help? You're retarded
