document.write( "Question 260349: When 10 cubic feet of water is poured into an empyt fish tank (rectangular Prism), the tank becomes 3/4 full. If the tank is 2 feet 8 inces wide and 40 inches long, how tall is the tank? \n" ); document.write( "
Algebra.Com's Answer #191775 by drk(1908)\"\" \"About 
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First we make sure all units are the same -> 2 ft 8 in means 32 inches.
\n" ); document.write( "Volume of tank = LWH = 32*40 *H = 1280H
\n" ); document.write( "We need a proportion now:
\n" ); document.write( "(i) \"10%2F%28%283%2F4%29%2A%281280h%29%29+=+X%2F%281280h%29\"
\n" ); document.write( "cross multiply to get
\n" ); document.write( "(ii) \"12800H+=+960HX\"
\n" ); document.write( "divide to get
\n" ); document.write( "X = 13.333 cu. ft.
\n" ); document.write( "--
\n" ); document.write( "13.3333 cu ft. (12 in / ft)^3 = 1280H cu. in.
\n" ); document.write( "which means
\n" ); document.write( "17040 cu. in. = 1280H cu. in.
\n" ); document.write( "H = 13.3125 in. \n" ); document.write( "
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