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29 July, 12:18

Which of the following is the surface area of the right cylinder below?

height 2

radius 9

A. 174 units2

B. 187 units2

C. 198 units2

D. 162 units2

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Answers (1)
  1. 29 July, 12:26
    0
    The lateral area of a cylinder (i. e. without the bottom and top lids) is 2πrh = 2π (9) (2) = 36π

    The area of the two lids is 2[π (r^2) ] = 162π

    The sum is: 36π + 162π = 198π

    I guess the answers included π but you couldn't type it.
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