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13 March, 01:38

A closed cylinder has a radius of 3cm and height 7 cm. find its total surface area.

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  1. 13 March, 02:05
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    The formula is (2 x 3.14 x r x r) + (2 x 3.14 x r x h). In this case you substitute 3 in for r and 7 in for h to get (2 x 3.14 x 3 x 3) + (2 x 3.14 x 3 x 7). You solve and get 188.4 square inches for the surface area.
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