The radius of a cylinder is 3x - 2 cm. The height of the cylinder is x + 3 cm. What is the surface area of the cylinder? Use the formula A = 2πr^2 + 2πrh.

A. 2π (3x^2 + 10x - 8)

B. 2π (12x^2 + 7x - 2)

C. 2π (12x^2 - 2x + 13)

D. 2π (12x^2 - 5x - 2)

Question

Rhett Levine

29 March, 08:47

+4

Answers (1)

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Gage · Answer 1

Surface area = 2 pi (3x-2) ^2 + 2 pi (3x - 2) (x + 3)

= 2 pi (9x^2 - 12x + 4 + 3x^2 + 7x - 6

= 2pi (12x^2 - 5x - 2)

Its D

The radius of a cylinder is 3x - 2 cm. The height of the cylinder is x + 3 cm. What is the surface area of the cylinder? Use the formula A = 2πr^2 + 2πrh.A. 2π (3x^2 + 10x - 8)B. 2π (12x^2 + 7x - 2)C. 2π (12x^2 - 2x + 13)D. 2π (12x^2 - 5x - 2)