Math, asked by rahulg671, 1 year ago

A jokers cap is in the form of right circular cone of base radius 7cm and height 27cm find the area of the sheet required to make 10 caps

Answers

Answered by Golda
376
Solution :-

Curved Surface Area of Cone = πrl

Given - Height = 27 cm and Radius = 7 cm

l (Slant height) = √h² + r²

⇒ l = √27² + 7²

⇒ l = √729 + 49

⇒ l = √778

⇒ l = 27.89

Now,

CSA of Cone = πrl

⇒ 22/7*7*27.89

⇒ 613.58 cm²

So, the area of sheet of cloth is 613.58 cm² to make a cap.

For making 10 such caps, area of sheet of cloth needed = 613.58*10

= 6135.8 cm²

Answer.
Answered by nikitasingh79
157
Given :

Radius(r) = 7 cm

Height (h)= 27 cm

Slant height(l) = √h² + r²

l = √27² + 7²

l = √729 + 49

l = √778


l = 27.89 cm

Now,

Curved surface area of a joker's cap = curved surface area of Cone = πrl

= (22/7) × 7× 27.89

Curved surface area of a joker's cap = 613.58 cm²


The sheet required to make 1 cap = 613.58 cm²

The sheet required to make 10 such caps = 613.58×10 = 6135.8 cm²

Hence, The sheet required to make 10 such caps is 6135.8 cm².

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Hope this will help you...
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