Question

Where r is the radius of the cylinder and h is the height of the cylinder.

Answer 1

Given:-

• radius = 7 inches
• height = 9 inches

To find:

• Surface area of cylinder

we know:-

$\bigstar \boxed{ \rm Surface \: Area \: of \: Cylinder=2\pi rh+2\pi {r}^{2} }$

So:-

⇢SA of cylinder=2πrh+2πr²

⇢SA of cylinder = 2πr(h+r)

⇢SA of cylinder = 2 × π × 7(7 + 9)

⇢SA of cylinder = 2 × π × 7 (16)

⇢SA of cylinder = 2 × π × 112

⇢SA of cylinder = 2 × 112 × π

⇢SA of cylinder = 224π inches ²

.°. Surface Area of cylinder is 224π inches².