Question

An iron object has a volume of 25 cm³. Given that the density of iron is 7.87g/cm³,what is the mass of the object?​

Answer 1

Answer

:Volume of iron = 25cm³

Density of iron = 7.87 gm/cm³

Mass = ?\

⟹Mass=Density×Volume

⟹Mass=7.87×25

⟹Mass=196.75gm

Answer 2

Given :

• Volume of an iron object = 25 cm³

• Density of the iron = 7.87 g/cm³

To find :

• Mass of the object

Solution :

★ Mass is the amount of matter contained in a body. It's S.I. unit is kg.

Formula to calculate mass :-

$\large\boxed{\bf\gray{Mass = Volume \times Density}}$

Substituting the given values :-

$\implies\sf Mass ~of~ the~ iron= 25 \times 7.87$

$\implies \sf Mass ~ of ~the ~iron = 196.75$

Therefore, mass of the iron = 196.75 g

Extra Information :

★ Volume is amount of space occupied by an object.

• Its S.I. unit is m³
• Its CGS unit is cm³.
• It is a scalar quantity. Because it has only magnitude and no direction.
• Volume = density × mass

★ Density of an object is mass divided by volume.

• It's S.I. unit is kg/m³.
• Its CGS units is g/cm3.
• It is a scalar quantity as it has magnitude but no direction.
• Density = mass ÷ volume