Math, asked by pritomkiller0, 6 months ago

find the curved surface area and the total surface area of the cylinder for which heights=30 cm and radius 14 cm​

Answers

Answered by midhunamurali2019
3

Answer:

2,640

Step-by-step explanation:

CSA of cylinder = 2πrh

                          = 2 * (22/7) * 14 * 30

                          = 2,640 sq.cm

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Answered by Anonymous
2

Step-by-step explanation:

\large{\red{\bold{\underline{Given:}}}}

 \sf \: Radius \: of \: the \: cylinder = 14cm \\  \\  \sf \: Height \: of \: cylinder = 30cm

\large{\green{\bold{\underline{To \: Find:}}}}

 \sf \: (i) \: Total \: surface \: area \: of \: cylinder \\  \\  \sf \: (ii) \: Curved \: surface \: area \: of \: cylinder

\large{\blue{\bold{\underline{Formula \: Used:}}}}

 \sf \: Total \:  surface \:  area = 2\pi r(r + h) \\  \\  \sf \: Curved  \: surface  \: area = 2\pi rh

\large{\red{\underline\bold{{Solution:}}}}

 \sf \: Let \: the \: radius \: of \: the \: cylinder \: be \: r, \\ \sf \: and \: the \: height \: of \: the \: cylinder \: as \: h

\large{\green{\bold{\underline{Then:}}}}

\sf \: (i) \: Total \:  surface  \: area  = 2\pi r(r + h)  \\  \\ \rightarrow \: \sf Total \:  surface  \: area = 2 \times  \frac{22}{7}  \times 7(14 + 30) \\  \\ \rightarrow \: \sf Total \:  surface  \: area = 2 \times  \frac{22}{7} \times 7(44) \\  \\ \rightarrow \: \sf \: Total \:  surface  \: area =  \frac{44}{\cancel7}   \times \cancel14 \times 44  \\  \\ \rightarrow \: \sf \: Total \:  surface  \: area = 3870 \:  {cm}^{2}

\large{\pink{\bold{\underline{Now:}}}}

 \sf \: (ii) \: Curved \:  surface \:  area  = 2\pi rh \\  \\ \rightarrow \: \sf \: Curved \:  surface \:  area = 2 \times  \frac{22}{7}  \times 14 \times 30 \\  \\ \rightarrow \: \sf \: Curved \:  surface \:  area =  2 \times  \frac{22}{\cancel7}  \times \cancel14 \times 30 \\ \\ \rightarrow \: \sf \: Curved \:  surface \:  area = 44 \times 2 \times 30 \\  \\ \rightarrow \: \sf \: Curved \:  surface \:  area = 2638 \:  {cm}^{2}

\large{\orange{\bold{\underline{Therefore:}}}}

 \sf \: The \: total \: surface \: area \: of \: cylinder \: is \\ \sf \: 3870 {cm}^{2}  \: and \: curved \: surface \: area \: is \: w</p><p>2638 {cm}^{2}.

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