Question

the curved surface area of a cylinder of height 5 cm is 440 CM square find the radius of the base​

Answer 1

Given height =5 cm

Curved surface area = 440 square cm

So, curved surface area of cylinder =22/7*r*r*h

or 440= 22/7*r^2*5

or r^2= (440*7)/110

or r^2= 28

or r=2 sq. root(7) cm

Hence, the answer is2sq. root (7) cm.

Answer 2

Answer:

radius = 14 cm

Step-by-step explanation:

Height of the cylinder: (h) = 5 cm,

Let the radius be = h cm

Curved surface area:-

(A) = 440 cm² = 2πrh = 440

=> 2 x (22/7) x 5 x h = 440 => h = (440 x 7 ) / (2 x 22 x 5 )

=> r = 14 cm

Hope it helps! :)