document.write( "Question 824607: The cost of renting a bus for a trip to the mountains was split evenly by 20 students. The day before the trip, 10 more students decided to travel too. As a result of dividing the cost evenly among the 30 students each student had to pay $9 less than originally. What was the total cost of renting the bus? \n" ); document.write( "

Algebra.Com's Answer #496609 by stanbon(75887) $\"\"$ $\"About$

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The cost of renting a bus for a trip to the mountains was split evenly by 20 students. The day before the trip, 10 more students decided to travel too. As a result of dividing the cost evenly among the 30 students each student had to pay $9 less than originally. What was the total cost of renting the bus?
\n" ); document.write( "----------------
\n" ); document.write( "Original DATA:
\n" ); document.write( "average cost = c/20 dollars per student
\n" ); document.write( "----
\n" ); document.write( "Expanded group DATA:
\n" ); document.write( "average cost = c/30 dollars per student
\n" ); document.write( "------
\n" ); document.write( "Equation:
\n" ); document.write( "new average - old average = 9
\n" ); document.write( "c/20 - c/30 = 9
\n" ); document.write( "----
\n" ); document.write( "30c - 20c = 9*20(30)
\n" ); document.write( "10c = 180*30
\n" ); document.write( "cost = 18*30 = $540.00
\n" ); document.write( "-------------------------
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( "================== \n" ); document.write( "

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