Question

The curved surface area of a cylinder is 2200 cm². If its radius is 10 cm,then
its height is_____cm. A. 14 B.21
C.35 D.20
D. 20

Answer 1

Answer:

Step-by-step explanation:

Curved surface area of cylinder=2πrh

2200=2×22/7×10×h

2200=440/7×h

2200×7/440=h

5×7=h

35=h

C.)35cm

Answer 2

Answer:

The answer is (C) 35 cm.

Step-by-step explanation:

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

Then , the area of the curved surface of the right circular cylinder will be ,

2πrh cm². Where π = 3.14 is a constant.

According to the question ,

curved surface area ( 2πrh ) = 2200 cm²

And , radius of the cylinder ( r ) = 10 cm.

Then , 2πrh = 2200   [ let 'h' be the height of the given cylinder ]

⇒ ( 2 × 3.14 × 10 × h ) = 2200

⇒ h = 2200/( 2 × 3.14 × 10 ) = 35 cm

∴ The height of the given right circular cylinder is 35 cm.