Question

Curved surface area of cylinder of r =7 cm, h=10 cm​

Answer 1

Answer :

• The curved surface area of cylinder is 440cm²

Given :

• Radius = 7cm
• Height = 10cm

To find :

• Curved surface area of cylinder

Solution :

As we know that,

• Curved surface area of cylinder = 2πrh

where, r is radius and h is height

》Curved surface area of cylinder = 2πrh

》2 × 22/7 × 7 × 10

》2 × 22 × 10

》44 × 10

》440

》440 cm²

Hence, Curved surface area of cylinder is 440cm²

More Explanation :

• Total surface area of cylinder = 2πr(r + h)
• Volume of cylinder = πr²h
• Curved surface area of cylinder = 2πrh
• Where ,r is radius and h is height

Answer 2

Given :

• Radius of cylinder = 7cm
• Height of cylinder = 10cm

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To Find :

• Curved Surface area

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Solution :

• As in the question Radius and height of the cylinder is given. We know that curved Surface Area of Cylinder is 2πrh. Where, Radius is 7cm and height is 10cm. By Putting the values in the formula we am easily find the current surface area of cylinder.

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${ \underline{ \boxed{ \sf{ \red{ \pmb{C.S.A \: of \: cylinder = 2πrh }}}}}}$

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Where,

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$\begin{cases} \blue{ \sf{ \pmb{Radius (r)}}} & = \red{\text{ \sf{7cm}}}\\ \\\blue{\sf{ \pmb{Height (h)}}}&= \red{\text{ \sf{10cm}}} \end{cases}$

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$\: \: \: \: \: \sf : \implies2 × \dfrac{22}{7} × 7 × 10$

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$\: \: \: \: \: \sf : \implies2 × 22 × 10$

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$\: \: \: \: \: \sf : \implies44 × 10$

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$\: \: \: \: \: \sf : \implies440cm²$

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${ \underline{ \boxed{ \bf{ \color{green}{\therefore{ C.S.A \: of \: cylinder \: is \: 440 {cm}^{2} }}}}}}$

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