Question

if the curved surface area of right circular cylinder of radius is 7 cm is 440 cm²,then find the height of the cylinder​

Answer 1

Answer:

Step-by-step explanation:

CSA = 2πrh

440 = 2 x 22/7 x 7 x h

440/(2 X 22) = h

h = 10 cm

Answer 2

Answer:

The height of the cylinder is 2.857 meters.

Step-by-step explanation:

If the height of a right circular cylinder is 'h' cm and the radius of the cylinder is 'r' cm.

Then ,the area of the curved surface of the right circular cylinder is ,

( π × r² × h ) cm². Where , π is a constant and π = 3.14 or ( 22/7 ).

In this case , r = 7 cm

according to the question ,

( π × r² × h ) = 440

⇒ ( 22/7 ) × 7² × h = 440

⇒ 22 × 7 × h = 440

⇒ h = 440/( 22 × 7 ) = 20/7 = 2.857 cm