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Find the formula for the surface area of a cylinder.

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2 π r^{2} + 2 πrh

π r^{2} + πrh

2 πr + 2 πrh

2 π r^{2} + πrh

answer is A.

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Detailed Solution

We need to find the formula for the surface area of a cylinder.
The cylinder consists of a rectangle and two circles.
The surface area of a circle is SA =

π r^{2}

.
The surface area of a rectangle SA=

2 πrh

.
The surface area of the cylinder

= 2 \times

area of the circular base

+

area of the rectangle
The surface area of the cylinder

= 2 π r^{2} + 2 πrh

Therefore, option 1 is correct.

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