Question

The CSA of a cone with radius 2cm & slant height 7cm is​

Answer 1

Given:-

• Radius (r) = 2cm

• Slant Height (l) = 7cm

To Find:-

• Curved Surface Area (CSA)

Formula used:-

• CSA of Cone = πrl

Solution:-

⟹ CSA of Cone = πrl

⟹ CSA of Cone = $\dfrac{22}{7}×2×7$

⟹ CSA of Cone = 44 cm²

Hence, the Curved Surface Area of Cone is 44 cm².

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More Formula for Cone:-

• Total Surface Area = πr(l + r)

• Volume = $\dfrac{1}{3}πr²h$

• Slant Height = $\sqrt{r²+h²}$

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Answer 2

$\huge{\underline{\green{Given:-}}}$

• ${{\red{Radius=2cm}}}$
• ${{\red{Slant \:height=7cm}}}$

$\huge{\underline{\green{To\:Find:-}}}$

• ${{\red{Curved \:Surface\: Area\: of\: cone}}}$

$\huge{\underline{\green{Solution:-}}}$

${\green{\boxed{\red{⟾ \:CSA \: of \: Cone \: = \: πrl}}}}$

${\green{\boxed{\red{⟾ \:CSA \: of \: Cone \: = \: \dfrac{22}{7}×2×7}}}}$

${\green{\boxed{\red{⟾ \:CSA \: of \: Cone \: = \: 44 \: cm²}}}}$

${\underline{\pink{∴ \:Hence, \:the\: CSA \:of \:Cone\: is\: 44 \:cm².}}}$

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