document.write( "Question 954900: I am building a bike ramp that is shaped like a square pyramid. I used two 4-foot by 8-foot sheets of plywood. How much plywood will I have left over if the height is 3ft and the lenght is 5ft. \n" ); document.write( "

Algebra.Com's Answer #583739 by macston(5194) $\"\"$ $\"About$

You can put this solution on YOUR website!
a=side of square=5ft; h=height=3ft; $\"A%5BL%5D\"$ =lateral area (surface area without base)
\n" ); document.write( " $\"A%5BL%5D=a%2Asqrt%28a%5E2%2B4h%5E2%29\"$
\n" ); document.write( " $\"A%5BL%5D=5ft%2Asqrt%28%285ft%29%5E2%2B4%283ft%29%5E2%29\"$
\n" ); document.write( " $\"A%5BL%5D=5ft%2Asqrt%2825ft%5E2%2B36ft%5E2%29\"$
\n" ); document.write( " $\"A%5BL%5D=5ft%2Asqrt%2861ft%5E2%29\"$
\n" ); document.write( " $\"A%5BL%5D=5ft%2A7.81ft\"$
\n" ); document.write( " $\"A%5BL%5D=39ft%5E2\"$ The ramp will take 39 square feet of plywood.
\n" ); document.write( "2 sheets of plywood = $\"2%284ft%2A8ft%29=2%2832ft%5E2%29\"$ = $\"64ft%5E2\"$
\n" ); document.write( " $\"64ft%5E2-39ft%5E2=25ft%5E2\"$ ANSWER: There will be 25 square feet of plywood left over. \n" ); document.write( "

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