document.write( "Question 403153: Mr. Brown painted two rooms in his house this past summer in 9 hours. Mr. Cook came over and helped him paint; the two of them worked together and painted another two rooms in 4 hours. How long would it have taken Mr. Cook to do the work, if he had done it himself? \n" ); document.write( "

Algebra.Com's Answer #285116 by scott8148(6628) $\"\"$ $\"About$

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in the 4 hr that they worked together, Mr Brown painted 4/9 of the rooms
\n" ); document.write( "___ this means that Mr Cook painted 5/9 of the rooms in 4 hr\r
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\n" ); document.write( "\n" ); document.write( "to do the whole (9/9) alone would take Mr Cook [4 / (5/9)] or [(4 * 9) / 5] hr \n" ); document.write( "

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