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OpenStudy (anonymous):
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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OpenStudy (luigi0210):
Do you know thw formula for surface area of a cylinder?
OpenStudy (anonymous):
yes , 2*pi*r^2+2*pi*r h
OpenStudy (luigi0210):
Good, now do you know what the variables stand for?
OpenStudy (anonymous):
yes
OpenStudy (luigi0210):
so what does r and h stand for?
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OpenStudy (anonymous):
r=2 h=8
OpenStudy (luigi0210):
Exactly :P Now just plug them in and solve. Is your answer rounded or exact?
OpenStudy (luigi0210):
Exact: 40pi Rounded: 125.6637
OpenStudy (anonymous):
thanks
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