Question

The CS.A. surface area of a right circular cone is 528 cm. If the slant height of the cone is 42 cm, find the total surface area of the cone.​

Answer 1

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$\huge{\underline{\underline{\sf{\blue{SOLUTION:-}}}}}$

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$\sf{\underline{\green{AnswEr:-}}}$

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• The total surface of area = 578.28 Cm²

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

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• The CS.A. surface area of a right circular cone is 528 cm. If the slant height of the cone is 42 cm.

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$\sf{\underline{\green{Find:-}}}$

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• The total surface of area = ?

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$\sf{\underline{\green{Explanation:-}}}$

$\sf{\underline\purple{Formula\:Used\:Here:-}}$

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$\bigstar\boxed{\sf{\red{Total\: surface \: of \: cone = \pi r \times (r + l)}}}$

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$\sf{\underline{\pink{Putting\:the\:values:-}}}$

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$\longrightarrow \sf { \dfrac{22}{7} \times 4 \times (4 + 42) }$

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$\longrightarrow \sf {\dfrac{22}{7} \times 4 \times 46 }$

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$\longrightarrow \sf {\dfrac{22}{7} \times 184 }$

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$\longrightarrow \sf {578.28}$

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$\:\:\:\:\dag\bf{\underline{\underline \red{Hence:-}}}$

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• The total surface of area is 578.28 Cm².

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$\rule{200}{2}$

Answer 2

Answer:

The C.S.A of right circular cone is 528 cm² . If the slant height of the cone is 42 cm. Find the radius of the base and T.S.A of the cone.

Give n :

The C.S.A of right circular cone is 528 cm² .

The slant height of the cone is 42 cm.

To find :

Radius of the base and T.S.A of the cone.

Solu tion :

Let the radius of the cone be r cm.

We know,

Where,

r = Radius

l = Slant height

Acco rding to the question,

Radius of the cone = 4 cm.

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We know,

T.S.A of cone = 578.28 cm² (approx).

There fore , the radi us of the base is 4 cm and the

T . S . A of the cone is 57 8. 28 cm² ( approx ) .

Step-by-step explanation:

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