SOLUTION: it takes robert and william 12 hours to complete a history project. If Robert works alone on the same project for 16 hours and let william take over, william needs another 7 hours
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Question 1087237: it takes robert and william 12 hours to complete a history project. If Robert works alone on the same project for 16 hours and let william take over, william needs another 7 hours to complete it. How long does it take william to complete the history project alone?
Answer by josgarithmetic(39620) (Show Source): You can put this solution on YOUR website!
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...robert and william 12 hours to complete a history project. If Robert works alone on the same project for 16 hours and let william take over, william needs another 7 hours to complete it.
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BETTER APPROACH:
If use rates just as variables, not in a form of ratioinal numbers with times as denominators,...
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William could do the whole job alone in 27 hours.
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