Question

A cylindrical pencil holder is shown below. The height is 18 cm and diameter 4 cm.

a) Find the capacity of the pencil holder?
b) The outer curved surface area is covered with colored paper. Calculate the area of the paper?

Answer 1

a) 226.08 cm³

b) 226.08 cm²

Explanation:

Capacity = Volume

3.14 × (4/2)² × 18

226.08 cm⁴

Curved SA

2 × 3.14 × (4/2) × 18

226.08 cm²

Answer 2

a=72pi or 226cm^3

b=same 72pi or 226cm^2