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A cylinder, opened at one end, has a radius of 3.5cm and ...

A cylinder, opened at one end, has a radius of 3.5cm and height 8cm. calculate the total surface area

A.

126.5cm $^2$

B.

165.0cm $^2$

C.

212.0cm $^2$

D.

214.5cm $^2$

View answer & explanation

Correct answer is D

The surface area of an open-top cylinder = πr(r + 2h),

where 'r' is the radius and 'h' is the height of the cylinder.

= $\frac{22}{7}$ * 3.5 (3.5 + 2 * 8)

= 11 (3.5 + 16) → 11 (19.5)

= 214.5cm $^2$

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