Question

4.
The radius and height of a cylinder are in the ratio 11:7. If the curved surface area of the cylinder is 121
square cm, then find its height and radius.​

Answer 1

Answer:

h=5.5unit,

r=3.5unit.

Step-by-step explanation:

Answer 2

Step-by-step explanation:

let the radius and height of the cylinder be 11x and 7x then-

curved surface area of cylinder = 2pirh

121 = 2 × 22/7 × 11x × 7x

• 121 = 44/7 × 77x²

121 × 7/44 = 77x²

77/4 = 77x²

x² = 77/4×77

x² = 1/4

x = 1/2

then,

height =11x = 11 × 1/2 = 11/2

radius= 7x = 7 × 1/2 = 7/2