Question

The area of the base of a right circular cylinder is 15400cm2 and its volume is 92400cm3. Find the area of the curved surface.​

Answer 1

Answer:

2640 cm²

Step-by-step explanation:

Volume of a cylinder =

$\pi {r}^{2} l \: = 92400$

Area of a base of cylinder =

$\pi {r}^{2} = \: 15400$

By the Area of base of cylinder we can calculate the radius which comes out to be

$r = \sqrt{15400 \div \pi } \\ r = \sqrt{4900} \\ r = 70cm$

Radius of Cylinder = 70cm

Now

if we divide Volume of the cylinder by Area of base of the cylinder we will get the length of the cylinder.

92400 ÷ 15400 = 6

6 cm is the length of the cylinder

$l = 6cm$

now

Curved surface area of the cylinder =

$2\pi rl$

2 × (22 ÷7) × 70 × 6 = 2640cm²

Hope this answers the question.

Answer 2

Answer:

$answer$

$2640 {cm}^{2}$