Question

Find its volume and surface area of a cylinder whose radius is 7 cm and height is 10 cm

Answer 1

surface area of cylinder is 440 cm sq.

Answer 2

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

$\green{\therefore{\text{Volume\:of\:cylinder=1540\:cm}^{3}}}$

$\green{\therefore{\text{T.S.A\:of\:cylinder=748\:cm}^{2}}}$

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

$\green{ \underline \bold{Given : }} \\ : \implies \text{Radius(r) = 7\: cm} \\ \\ : \implies \text{Height(h) = 10 \: cm} \\ \\ \red{ \underline \bold{To \: Find : }} \\ : \implies \text{Volume \: of \: cylinder = ? }\\ \\ : \implies \text{T.S.A\: of \: cylinder = ? }$

• According to given question :

$\bold{As \: we \: know \: that} \\ : \implies \text{Volume\: of \: cylinder} =\pi r^{2}h \\ \\ : \implies \text{Volume\: of \: cylinder} = \frac{ 22}{7} \times {7}^{2}\times 10 \\ \\ : \implies \text{Volume\: of \: cylinder} =22 \times 7\times 10 \\ \\ \green{ : \implies \text{Volume\: of \: cylinder} =1540\: {cm}^{3}} \\ \\ \bold{As \: we \: know \: that} \\ : \implies \text{T.S.A\: of \: cylinder} =2\pi r(h + r) \\ \\ : \implies \text{T.S.A\: of \: cylinder} =2 \times \frac{22}{7} \times 7(10+ 7) \\ \\ : \implies \text{T.S.A\: of \: cylinder} =2 \times 22 \times 17 \\ \\ \green{ : \implies \text{T.S.A\: of \: cylinder} =748 \: {cm}^{2} }$