Question

9. In fig.
10. Find the curved surface areå of cylinder whose radius is 7 cm and height 10 cm.
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Answer 1

Given :-

• Radius of the cylinder is 7 cm
• Height of the cylinder is 10 cm

To Find :-

• Curved Surface area of that cylinder

Solution :-

~Here, we're given the radius and height of cylinder and we need to find the Curved Surface Area ( CSA ) . We can easily find the CSA by putting the values in it's formula.

As we know that ,

★ CSA of Cylinder = 2πrh

Where,

• π is 22/7
• r is radius
• h is height

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Finding the CSA :-

$\sf \dashrightarrow 2 \times \dfrac{22}{7} \times 7\;cm \times 10\;cm$

$\sf \dashrightarrow 2 \times 22 \times 10\;cm$

$\boxed{\bf{ \bigstar \;\; CSA = 440 \; cm^{2} }}$

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Therefore,

• Curved Surface area of the cylinder is 440 cm²

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Answer 2

★Given :

• A cylinder whose radius is 7 cm and height 10 cm.

★ To find :

• Curved Surface area

★ Solution :

• By using the formula 2πrh We will get the curved Surface Area of Cylinder.

✰ Radius (r) = 7cm

✰ Height (h) = 10 cm

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Let's Find out...!

Curved Surface area = 2πrh

➤ 2 × 22/7 × 7 × 10

➤ 2 × 22 × 10

➤ 440 cm²

∴ CSA of cylinder is 440 cm²

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