shelberA0ller shelberA0ller

05-07-2016
Mathematics

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The diameter of the base of right cone 12 cm . The total surface area of the cone is 306 cm^2

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Panoyin Panoyin

05-07-2016

A = πr² + πrl
306.00 = 3.14(6)² + 3.14(6)(l)
306.00 = 3.14(36) + 3.14(6l)
306.00 = 113.04 + 18.84l
- 113.04 - 113.04
192.96 = 18.84l
18.84 18.84
10.24 ≈ l

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