Question

hiii friends solve this plz..

●The curved surface area of a cylinder is 1,320cm^2 and its volume is 2,640cm^3, find the height.....

I need solutions...
. &
ANSWER :-52.5cm....

◇◆◇BRAINLY◇◆◇

Answer 1

Answer:

52.5 cm

Step-by-step explanation:

(i)

Given that curved surface area of cylinder = 1320 cm²

⇒ 2πrh = 1320

⇒ πrh = 660 cm²

(ii)

Given that volume of cylinder = 2640

⇒ πr²h = 2640

Now,

On solving (i) & (ii), we get

⇒ (πr²h)/(πrh) = 2640/660

⇒ r = 4 cm.

Substitute r = 4 in (i), we get

⇒ πrh = 660

⇒ (22/7) * 4 * h = 660

⇒ 88h = 660 * 7

⇒ 88h = 4620

⇒ h = 52.5 cm.

Therefore, height of the cylinder = 52.5 cm.

Hope it helps!

Answer 2

Step-by-step explanation:

volume=2640

(22/7)*r^2*h=2640

h=2640*7/(r^2*22)-------------------(1)

csa=1320

2*22/7*r*h=1320

h=1320*7/(2*22*r)------------------------(2)

from (1)&(2)

2640*7/(r^2*22)=1320*7/(2*22*r)

r=h=4