Question

radius of an aluminium sphere is 0.18 cm. if density of aluminium is 2.70g/cc calculate its mass

Answer 1

Hi there !!!

We know that ,
Density = Mass / Volume.


Density = 2.70 g /cm³

Radius = 0.18 cm


Volume of the sphere = 4/3πr³
= $\frac{4}{3}$ ×3.14 × (0.18)³
= $\frac{4}{3}$× 3.14×0.005832
= 0.024 cm³ ( approx.)

Mass = Density × Volume
          = 2.70 ×0.02441664
          = 0.648 grams

Answer 2

We know that ,

Density = Mass / Volume.

Density = 2.70 g /cm³

Radius = 0.18 cm

Volume of the sphere = 4/3πr³

=  ×3.14 × (0.18)³

= × 3.14×0.005832

= 0.024 cm³ ( approx.)

Mass = Density × Volume

         = 2.70 ×0.02441664

         = 0.648 grams

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