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In the diagram, the base diameter is 14cm while the height is 12cm. Calculate the...

Mathematics
JAMB 1995

In the diagram, the base diameter is 14cm while the height is 12cm. Calculate the total surface area if the cylinder has both a base and a top.[\(\pi \frac{22}{7}\)]
  • A. 836cm2
  • B. 308cm2
  • C. 528cm2
  • D. 154cm2
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Correct Answer: Option A
Explanation
Area(S) = 2\(\pi r^2 + 2 \pi rh = 2\pi r(h + r)\)

D = 14cm, 2r = D

r = \(\frac{D}{2}\)

= 7cm

S = 2 x \(\frac{22}{7} \times [7 + 12] = 44 \times 19\)

= 836cm2

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