Question

The diameter of a right circular cylinder is 21 cm and its height is 8 cm. The volume of the cylinder is-​​

Answer 1

Given :

• Diameter = 21 cm

• Radius = 21/2 cm

• Height = 8 cm

To Find :

• Volume of the cylinder ?

Solution :

☆Formula used :

• Volume of cylinder = πr²h

☆Putting the values :

→ Volume = 22/7 × 21/2 × 21/2 × 8 = 2772 cm³

∴ Hence, the volume of cylinder is 2772 cm³

Answer 2

★ Given :-

• The diameter of a right circular cylinder is 21 cm and its height is 8 cm.

★ Have to Find :-

• What's the volume of the cylinder?

★ Calculation :-

As we know the formula of volume of cylinder.

• Volume of cylinder – πr²h

where,

π = 22/7

" r " = 21/2 { Radius }

" h " = 8 { Height }

Therefore$.$

Substituting the values,

V = 22/7 × 21/2 × 21/2 × 8

➹ 22/7 * 10.5 * 10.5 * 8

➹ 2772 cm³

So,

☆ The volume is 2772 cm³