document.write( "Question 939417: Lorenzo, a gardener, can mow a lawn in 3hours. After 2 hours it rained and he stopped moving the lawn. In the afternoon. Tina, completed the rest of the work in one hour and 30 minutes. How long would it take Tina to mow the lawn by herself? \n" ); document.write( "

Algebra.Com's Answer #572408 by josmiceli(19441) $\"\"$ $\"About$

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Lorenzo's rate of mowing is:
\n" ); document.write( "( 1 lawn ) / ( 3 hrs )
\n" ); document.write( "In $\"+2+\"$ hrs, he mows $\"+%281%2F3+%29%2A2+=+2%2F3+\"$
\n" ); document.write( "of the lawn
\n" ); document.write( "That means there id $\"+1%2F3+\"$ of the lawn left to mow
\n" ); document.write( "---------------
\n" ); document.write( "Tina finishes mowing, so her rate is:
\n" ); document.write( "( 1/3 of the lawn ) / ( 1.5 hrs )
\n" ); document.write( "I can say:
\n" ); document.write( "Let $\"+t+\"$ = her time in hrs to mow lawn by herself
\n" ); document.write( " $\"+%28%281%2F3%29%29+%2F+1.5+=+1+%2F+t+\"$
\n" ); document.write( "Multiply both sides by $\"+1.5t+\"$
\n" ); document.write( " $\"+%281%2F3%29%2At+=+1.5+\"$
\n" ); document.write( " $\"+t+=+4.5+\"$
\n" ); document.write( "Tina can mow the lawn y herself in 4.5 hrs
\n" ); document.write( " \n" ); document.write( "

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