1.

The curved surface area of a right circular cylinder of height 25 cm is 3300 cm2. Find the diameter of the base of the cylinder.1. 12 cm2. 23 cm3. 21 cm4. 42 cm5. None of these

Answer» Correct Answer - Option 4 : 42 cm

Given:

Curved surface area of cylinder = 3300 cm2

Height of cylinder = 25 cm

Formula used:

Curved surface area of cylinder = 2π × radius × height

Calculation:

2 × (22/7) × radius × 25 = 3300

⇒ Radius = (3300 ×7)/(2 × 22)

⇒ Radius = 21 cm

∴ Diameter = 2 × 21 = 42 cm


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