xojazzyyxo
A cylinder has a radius of 2 cm and a height of 8 cm. The surface area of the cylinder is _____ cm².



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Luigi0210
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Do you know thw formula for surface area of a cylinder?

xojazzyyxo
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yes , 2*pi*r^2+2*pi*r h

Luigi0210
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Good, now do you know what the variables stand for?

xojazzyyxo
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yes

Luigi0210
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so what does r and h stand for?

xojazzyyxo
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r=2 h=8

Luigi0210
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Exactly :P
Now just plug them in and solve.
Is your answer rounded or exact?

Luigi0210
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Exact: 40pi
Rounded: 125.6637

xojazzyyxo
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thanks