The curved surface area of a cylinder is 1320 cm2 and its base has di

1.	The curved surface area of a cylinder is 1320 cm2 and its base has diameter 21 cm. Find the volume of the cylinder.
Answer» We have, Diameter of base = 21 cm Radius of base = d/2 = 21/2 cm Curved surface area = 1320 cm² 2πrh = 1320 2 × 22/7 × 21/2 × h = 1320 h = 1320×7×2 / 2×22×21 = 18480/924 = 20cm ∴ Volume of cylinder = πr²h = 22/7 × 21/2 × 21/2 × 20 = 6930 cm³

The curved surface area of a cylinder is 1320 cm2 and its base has diameter 21 cm. Find the volume of the cylinder.

Answer»

We have,

Diameter of base = 21 cm

Radius of base = d/2 = 21/2 cm

Curved surface area = 1320 cm²

2πrh = 1320

2 × 22/7 × 21/2 × h = 1320

h = 1320×7×2 / 2×22×21

= 18480/924

= 20cm

∴ Volume of cylinder = πr²h

= 22/7 × 21/2 × 21/2 × 20

= 6930 cm³