document.write( "Question 565530: I am having a hard time with this word problem i know that it is D=R*T just can't set it up!! Here goes Cara can shovel the snow from her driveway in 25min.Therease can do the smae job in 30min. How long would it take cara and Teresa to shovel the driveway if they worked toghter? \n" ); document.write( "

Algebra.Com's Answer #365845 by stanbon(75887) $\"\"$ $\"About$

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Cara can shovel the snow from her driveway in 25min.Therease can do the smae job in 30min. How long would it take cara and Teresa to shovel the driveway if they worked toghter?
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\n" ); document.write( "The problem has nothing to do with D = RT
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\n" ); document.write( "Cara rate = 1/25 job/min
\n" ); document.write( "Theresa rate = 1/30 job/min
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\n" ); document.write( "Together rate = 1/x job/min
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\n" ); document.write( "Equation:
\n" ); document.write( "rate + rate = together rate
\n" ); document.write( "1/25 + 1/30 = 1/x
\n" ); document.write( "(30+25)/(25*30) = 1/x
\n" ); document.write( "x = (25*30)/(30+25)
\n" ); document.write( "x = 13.64 minutes (time for them to do the job together)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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