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13-02-2018
Mathematics

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Which expression represents the difference of their lateral area?

Which expression represents the difference of their lateral area class=

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13-02-2018

D is the answer.
LA of cube is 4(2r.2r) = 16 r^2
LA of cylinder is 2πr x 2r = 4πr^2
16 r^2 - 4πr^2 = 4r^2(4-π)

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