Question

the surface are of a cylinder is 1320cmsq and volume is 2640cmsq find the height​

Answer 1

$Solution :$

Curved surface area of a cylinder is 2πrh.

Given curved surface area of a cylinder is 1320 cm2 .

2πrh = 1320 cm2 .--------(1)

Given volume of the cylinder is 2640 cm3 ,

Volume of the cylinder is πr2h.

πr2h = 2640 --------(2)

Divide (2) by (1) we get

πr2h / 2πrh = 2640 / 1320

r / 2 = 2

r = 4 cm.

Now 2πrh = 1320

2 x (22/7) x 4 x h = 1320

h = (1320 x 7) / (44 x 4)

h = 52.5 cm.

∴ heigt of the cylinder = 52.5 cm.

Answer 2

Answer:

some thing is missing probably

Step-by-step explanation:

we have total surface area of cylinder = 1320 cmsq

$2\pi r(r + h) = 1320$

On multiplying 2 on both sides

$4\pi r(r + h) = 2640$

above is equation 1

and Volume of cylinder = 2640 cmsq

$\pi r^{2} h = 2640$

above is equation 2

On equating equation 1 and equation 2

$\pi r ^{2} h = 4\pi r (r + h) \\ = > rh = 4(r + h)$

Now if we have the radius the question would be solved

or it is the curved surface area