Question

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 = 23r+ 2 x rh.

Answer 1

Surface Area of the cylinder is 6x² + 83x - 58 cm²

Explanation:

• Step 1: Given surface area of the cylinder, A = 23r + 2rh. Here, r = (3x - 2) and h = (x + 3)

⇒ A = 23(3x - 2) + 2(3x - 2)(x + 3)

⇒ A = 69x - 46 + (6x² + 18x - 4x - 12)

⇒ A = 6x² + 83x - 58 cm²