Question

diameter of metallic ball is 42 m. if density of metal is 9.8 g per m. find mass of ball​

Answer 1

Step-by-step explanation:

Given,

diameter of the metallic ball =4.2 m

We know,

radius =

2

diameter

∴ r=

2

4.2

cm=2.1 cm

Density =

volume

Mass

∴ Mass = Density×volume

⇒ 8.99 cm

2

×volume

volume of a metallic ball =

3

4

×π×r

3

=

3

4

×2.1×2.1×2.1 cm

3

∴ Mass=8.99×

3

4

×π2.1×2.1×2.1 cm

3