document.write( "Question 174097: Hello, please could you help me with a question.
\n" ); document.write( "I need to find the surface area of a cylinder when the radius is 6cm and the length is 21 cm,
\n" ); document.write( "Please could you show the full step by step guide as i need to show the working out.
\n" ); document.write( "Many thanks
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Algebra.Com's Answer #129005 by nycsub_teacher(90)\"\" \"About 
You can put this solution on YOUR website!
You need a formula and it is
\n" ); document.write( "surface area = 2(πr^2) + 2(πr)(h), where r = radius, h = height
\n" ); document.write( "and π = pi = 3.14
\n" ); document.write( "I guess by length you meant to type height.
\n" ); document.write( "Let SA = surface area of cynlinder for short.
\n" ); document.write( "SA = 2(3.14)(6)^2 + 2(3.14)(21)
\n" ); document.write( "SA = 226.08 + 131.88
\n" ); document.write( "SA = 357.96cm^2 \r
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