What is the mass of a metal sphere ofradius 3.0 cm, if its density is

1.	What is the mass of a metal sphere ofradius 3.0 cm, if its density is 7.0 g/cm³?Express your answer in kg too.
Answer» Answer: 792g Step-by-step EXPLANATION: ACCORDING to the given question, r = radius = 3 cm d = density = 7 g/cm^3 V = volume and m = mass And we are asked to find the mass of the metal sphere. We know, Density = mass/Volume Mass = Volume×density m = 4/3 × π × r^3 × d Putting the values we get, m = 4/3 × 22/7 × 27 × 7 m = (4×22×27×7)/(3×7) m = 4×22×9 m = 792 g Thus mass of the metal sphere is 0.792 kg or 792 g .

What is the mass of a metal sphere ofradius 3.0 cm, if its density is 7.0 g/cm³?Express your answer in kg too.

Answer»

Answer:

792g

Step-by-step EXPLANATION:

ACCORDING to the given question,

r = radius = 3 cm

d = density = 7 g/cm^3

V = volume and m = mass

And we are asked to find the mass of the metal sphere.

We know,

Density = mass/Volume

Mass = Volume×density

m = 4/3 × π × r^3 × d

Putting the values we get,

m = 4/3 × 22/7 × 27 × 7

m = (4×22×27×7)/(3×7)

m = 4×22×9

m = 792 g

Thus mass of the metal sphere is 0.792 kg or 792 g .