Question

The diameter of a metallic ball is 4.2cm. what is the mass of the ball. If the density of the metal ball is 8.9per cm^3

Answer 1

Step-by-step explanation:

given:2r=4.2cm

r=2.1cm

volume of metallic ball= 4πr²/3

=(4 X 22 X 2.1 X 2.1)/(3X7)

=18.48cm³

now density=8.9

mass/volume=8.9

mass= 8.9 X 18.48= 75.472 gram

Answer 2

Answer:

PLZ MARK IT AS BRAINLIEST♥♥

Step-by-step explanation:

Diameter of ball = 4.2cm

Radius of ball = 4.2/2

                       = 2.1 cm

Volume of ball =4/3♎r^3

      =4/3×22/7×2.1×2.1×2.1

      =38808/1000

     =38.808cm^3

Density = mass/volume

8.9g = mass/38.808cm^3

Mass = 8.9×38.808cm^3

Mass = 345.391g

Hence, mass of ball is 345.391g