document.write( "Question 621039: I can weed the garden in 90 min. MY friend needs 20 min more. How long will it take us to do the job together \n" ); document.write( "

Algebra.Com's Answer #390543 by matt501823(7) $\"\"$ $\"About$

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If you weed the garden in 90 minutes it means that you weed $\"6%2F9\"$ of a garden per hour. If you friend takes 20 more minutes that means that he takes 110 minutes or that he weeds $\"6%2F11\"$ of a garden per hour. If you find a common denominator between $\"6%2F9\"$ and $\"6%2F11\"$ you get $\"66%2F99\"$ and $\"54%2F99\"$ . If you add 66 and 54 together you get $\"66%2B54=110\"$ . Thus you complete $\"110%2F99\"$ of the weeding in 1 garden over the course of 1 hour. $\"110%2F99\"$ can be simplified to $\"10%2F9\"$ which amounts to the non-terminating decimal of 1.111. If you were to divide 1 hour (60 minutes) by 1.111 you would get $\"60%2F1.111=54\"$ (in minutes). This means that it would take approximately 54 minutes for you and your friend to finish weeding 1 garden. \n" ); document.write( "

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