Asked by Anonymous

A cylinder of height 12cm and radius 5cm is made of cardboard use the value of 3.1 to calculate the total surface area of the cardboard needed to make

a) a closed cylinder.
b) a cylinder open at one end
Answered by Queen
I don't understand math lol
Answered by PsyDAG
The surface area of a cylinder is height + 2(pi*r^2).

(pi*r^2) is the area at each end.

Is 3.1 the diameter or radius? 2r = D
Answered by oobleck
The surface area of a cylinder is 2 pi rh + 2(pi*r^2).
Answered by if a cylinder's height is 12cm and the radius is 5cm is made of cardboard. then use value of 3.1 for n to calculate the total area of cardboard needed to make "a closed cylinder "
I don't know the answer
Answered by Skyler
I don't get it
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