Question

the diameter of a metallic ball is 4.2 cm .what is the mass of the ball if the density of the metal is 8.9 gram per cm cube​

Answer 1

Answer:The diameter of a metallic ball is 4.2 cm. What is the mass of the ball, if the density of the metal is 8.9 g per cm3? = 38.808 x 8.9 = 345.39 g (approx.).

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Answer 2

Diameter of the ball = 4.2 cm

Radius = 4.2/2 = 2.1 cm

Volume of the ball ---> 4/3πr^3

4/3 x 22/7 x 2.1 x 2.1 x 2.1 = 38.808 cm^3

Volume = Mass / Density

Mass = Volume x Density

Mass = 38.808 x 8.9 = 345.3912 g