Question

The curved surface area of a right circular cylinder of radius 3cm and height 2 cm is equal

to…….

a. 12π cm2

b. 6 π cm2

c. 2 π cm2

d. 16 π cm​

Answer 1

Given :

• Radius of the cylinder = 3cm

• Height of the cylinder = 2cm

To find :

• Curved surface area of the cylinder.

solution:

• As we know that ,

$\star \boxed{ \bold{\red{ curved \: surface \: area \: of \: cylinder = 2\pi \: rh}}}$

•Put the values of radius and height :

=> CSA of cylinder= 2π(3)(2)

=> CSA of cylinder= 12 π cm²

Hence , the option A is correct :

Answer 2

Given:-

Radius = 3 cm

Height = 2 cm

To Find

Curved surface area = ?

Solution:-

Formula to find the curved surface area of cylinder = $2 \pi rh$

Put the given values $\implies$

= $2 \pi \times 3 \times 2$

= $12 \pi cm^2$

Answer $\implies$ Option A $12 \pi cm^2$

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✯ Know more :-

▪ $T.S.A = C.S.A + 2 \times Area~of~circles$

= $2 \pi rh + 2 \pi r^2$

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

▪ Volume = $\pi r^2h$