Question

find the curved surface area of cylinder whose radius and height are 4.9 can and 8 cm

Answer 1

CSA of cylinder = 2πrh

so,
CSA = 2 × 22/7 × 4.9 × 8
= 246.4 cm2

Answer 2

$\blue{\bold{\underline{\underline{Answer:}}}}$

$\green{\therefore{\text{C.S.A\:of\:cylinder=246.4\:cm}^{2}}}$

$\orange{\bold{\underline{\underline{Step-by-step\:explanation:}}}}$

$\green{ \underline \bold{Given : }} \\ : \implies \text{Radius(r) = 8 \: cm} \\ \\ : \implies \text{Height(h) = 4.9\: cm} \\ \\ \red{ \underline \bold{To \: Find : }} \\ : \implies \text{C.S.A\: of \: cylinder = ? }$

• According to given question :

$\bold{As \: we \: know \: that} \\ : \implies \text{C.S.A\: of \: cylinder} =2\pi rh \\ \\ : \implies \text{C.S.A\: of \: cylinder} =2 \times \frac{ 22}{7} \times 8 \times 4.9 \\ \\ : \implies \text{C.S.A\: of \: cylinder} =2 \times 22 \times 5.6\\ \\ \green{ : \implies \text{C.S.A\: of \: cylinder} =246.4 \: {cm}^{2}} \\ \\ \bold{Some \:formula's\: related \: to\:this\:topic} \\ \pink{\circ\: \text{T.S.A\: of \: cylinder} =2\pi r(h + r)} \\ \\ \pink{\circ\:\text{Volume\: of \: cylinder} = \pi r^{2}h}$