document.write( "Question 897700: Mark drove to visit his grandma at 75km/hr. He returned at 50km/hr. It took 45 minutes longer to return home than to get to his grandmas house, how long dod it take him to get home? \n" ); document.write( "
Algebra.Com's Answer #544243 by stanbon(75887)\"\" \"About 
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Mark drove to visit his grandma at 75km/hr. He returned at 50km/hr. It took 45 minutes longer to return home than to get to his grandmas house, how long dod it take him to get home?
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\n" ); document.write( "To Grandma DATA:
\n" ); document.write( "rate = 75 km/hr ; distance = x km ; time = d/r = x/75 hrs
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\n" ); document.write( "From Grandma DATA:
\n" ); document.write( "rate = 50 km/hr ; distance = x km ; time = d/r = x/50 hrs
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\n" ); document.write( "Equation:
\n" ); document.write( "time - time = 3/4 hr
\n" ); document.write( "x/50 - x/75 = 3/4
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\n" ); document.write( "Multiply thru by 300 to get:
\n" ); document.write( "6x - 4x = 36
\n" ); document.write( "2x = 36
\n" ); document.write( "x = 18 km (distance)
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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