A right cone has a base diameter that is 12cm and a slant height that is 45cm what is the surface area

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asked Dec 1, 2018 14.2k views

1 Answer

Nicola Mingotti · Answer 1 · 2018-12-06T02:41:22+0000

Given:
Base diameter = 12 cm, so base radius is r = 6 cm.
Slant height, L = 45 cm

The surface area is given by the formula
A = πr² + πrL

Therefore
A = π*6² + π*6*45
= 306π cm²
= 961.3 cm² (nearest tenth)

Answer: 306π cm² or 961.3 cm² (nearest tenth)

A right cone has a base diameter that is 12cm and a slant height that is 45cm what is the surface area

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