document.write( "Question 133977: It takes Bob three hours to mow a lawn, and John can mow the same lawn in 2 hours. How long would it take the two of them working together to mow that lawn? \n" ); document.write( "

Algebra.Com's Answer #97947 by solver91311(24713) $\"\"$ $\"About$

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If it takes Bob 3 hours to mow a lawn, then he can mow $\"1%2F3\"$ of a lawn per hour. Likewise, John can mow $\"1%2F2\"$ of a lawn per hour. Together they can mow $\"1%2F3%2B1%2F2=5%2F6\"$ of a lawn per hour. So it will take $\"1%2F%285%2F6%29=6%2F5\"$ hours for them to mow one lawn together. $\"6%2F5\"$ hour is 1 and 1/5 hour is 1 hour and 12 minutes. An hour and a quarter if you give them a glass of lemonade when they are done. \n" ); document.write( "

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