Question

3. Cylinder of radius 5 cm and height 20 cm, is made of iron of density 7800 kg/m³, find

a. The volume of the cylinder in m³
b. The mass of the cylinder in kg.​

Answer 1

The volume of the cylinder is 1.57 x 10⁻³ m³.

V = πr²h

V = π(5cm)²(20cm)(1m/100cm)³

V = 1.57 x 10⁻³ m³

The mass of the cylinder is 12.25 kg.

ρ = m/v

m = ρv

m = (7800 kg/m³)(1.57 x 10⁻³ m³)

m = 12.25 kg