Curved surface area of a cylinder is 1980 cm2 and radius of its base

1.	Curved surface area of a cylinder is 1980 cm2 and radius of its base is 15 cm. Find the height of the cylinder. (π =\(\frac{22}7\) ).
Answer» Given: Curved surface area of cylinder = 1980 sq.cm., radius (r) = 15 cm To find: Height of the cylinder (h) Solution: Curved surface area of cylinder = 2πrh ∴ 1980 = 2 x \(\frac{22}7\) x 15 x h ∴ h = \(\frac{1980\, \times\,7}{2\,\times\,22\,\times\,5}\) ∴ h = 21 cm ∴ The height of the cylinder is 21 cm.

Curved surface area of a cylinder is 1980 cm2 and radius of its base is 15 cm. Find the height of the cylinder. (π =\(\frac{22}7\) ).

Answer»

Given: Curved surface area of cylinder = 1980 sq.cm.,

radius (r) = 15 cm

To find: Height of the cylinder (h)

Solution:

Curved surface area of cylinder = 2πrh

∴ 1980 = 2 x \(\frac{22}7\) x 15 x h

∴ h = \(\frac{1980\, \times\,7}{2\,\times\,22\,\times\,5}\)

∴ h = 21 cm

∴ The height of the cylinder is 21 cm.