Answer:
67.0 cm³
Step-by-step explanation:
The composite shape is a hemisphere of radius 2 atop a cylinder of height 4 and radius 2. The volume formulas for a cylinder and a sphere can be used to find its volume. (Dimensions are in centimeters.)
Hemisphere
The formula for the volume of a hemisphere is half that for the volume of a sphere:
V = (1/2)(4/3πr³) = 2/3πr³
For a radius of 2 cm, the volume is ...
V = 2/3π(2 cm)³ = 16/3π cm³
Cylinder
The formula for the volume of a cylinder is ...
V = πr²h . . . . . . for radius r, height h
For the given dimensions, the volume is ...
V = π(2 cm)²(4 cm) = 16π cm³
Total
The total volume of the solid is the sum of these volumes:
total = hemisphere volume + cylinder volume
total = ((16/3)π +16π ) cm³ = (64/3)π cm³ ≈ 67.0 cm³
The volume of the composite solid is about 67.0 cm³.
