Question

Find the C.S.A and T.S.A of a cylinder the diameter of whose base is 7cm and height is 60 cm

Answer 1

csa = 1320
tsa = 1394

Answer 2

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

$\green{\therefore{\text{C.S.A\:of\:cylinder=1320\:cm}^{2}}}$

$\green{\therefore{\text{T.S.A\:of\:cylinder=1397\:cm}^{2}}}$

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

$\green{ \underline \bold{Given : }} \\ : \implies \text{Radius(r) = 3.5\: cm} \\ \\ : \implies \text{Height(h) = 60 \: cm} \\ \\ \red{ \underline \bold{To \: Find : }} \\ : \implies \text{C.S.A \: of \: cylinder = ? }\\ \\ : \implies \text{T.S.A\: of \: cylinder = ? }$

• According to given question :

$\bold{As \: we \: know \: that} \\ : \implies \text{C.S.A\: of \: cylinder} =2\pi rh \\ \\ : \implies \text{C.S.A\: of \: cylinder} =2 \times \frac{ 22}{7} \times 3.5\times 60 \\ \\ : \implies \text{C.S.A\: of \: cylinder} =2 \times 22 \times 30 \\ \\ \green{ : \implies \text{C.S.A\: of \: cylinder} =1320 \: {cm}^{2}} \\ \\ \bold{As \: we \: know \: that} \\ : \implies \text{T.S.A\: of \: cylinder} =2\pi r(h + r) \\ \\ : \implies \text{T.S.A\: of \: cylinder} =2 \times \frac{22}{7} \times 3.5(60 + 3.5) \\ \\ : \implies \text{T.S.A\: of \: cylinder} =2 \times 22 \times 31.75 \\ \\ \green{ : \implies \text{T.S.A\: of \: cylinder} =1397 \: {cm}^{2} }$