SOLUTION: Tom can type a document in four hours. Dick can type the same document in 5.5 hours. How long will it take them to type the document if they work together?
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Question 1046881: Tom can type a document in four hours. Dick can type the same document in 5.5 hours. How long will it take them to type the document if they work together?
Thank you Answer by josmiceli(19441) (Show Source):
You can put this solution on YOUR website! Add their rates of typing
Tom's rate:
[ 1 document ] / [ 4 hrs ]
Dick's rate:
[ 1 document ] / [ 4 hrs ]
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Let = their time in hrs working together
Multiply both sides by
it will take them 2.31579 hrs
