Question

the curved surface area of cylinder is 1980 cm square and radius of it's base 15 cm . find height of cylinder

Answer 1

CSA of cylinder = 2*pie*radius*height

1980 = 2*22/7*15*height
Height =( 1980*7)/22*2*15
Height = 7*3
Height = 21m

Ans - height is 21 m

Answer 2

$\huge\mathcal\red{Answer :}$

$\small\bold{Given, C.S.A = 1980cm^2}$

$\small\bold{Radius = 15cm}$

$\small\bold{Height = ?}$

$\small\bold{Curved\: Surface\: area = 2πrh}$

$\small\bold{1980 = 2 × 22/7 × 15 × h}$

$\small\bold{1980 × 7 / 2 × 22 × 15 = h}$

$\small\bold{21 cm = h}$

____________________________________________

Hence, the Height is 21cm.

$\huge\mathfrak\orange{Hope\: it\: helps}$