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Ilia_Sergeevich [38]
3 years ago
6

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

Mathematics
1 answer:
inn [45]3 years ago
7 0
           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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