Question

the slant height of a right circular cone is 10 M and its height is 8 M find the area of its curved surface​

Answer 1

Given:

Slant height of the cone (l) = 10 m

Height of the cone (h) = 8 m

Find:

C.S.A. of the cone

Solution:

Let the radius of the cone be 'r' m

Pythagoras theorem:-

=> H² = P² + B²

• Hypotenuse = 10 m
• Perpendicular = 8 m

Base = r m

=> (10)² = (8)² + r²

=> 100 = 64 + r²

=> 100 - 64 = r²

=> 36 = r²

=> √36 = r

=> 6 = r

=> r = 6m

The Curved surface area of the cone => πrl

=> 22/7 × 6 × 10

=> 22/7 × 60

=> 1320m²

Hence, the Curved surface area of the cone is 1320 m².

I hope it will help you.

Regards.

Answer 2

Answer:

=> (10)² = (8)² + r²

=> 100 = 64 + r²

=> 100 - 64 = r²

=> 36 = r²

=> √36 = r

=> 6 = r

=> r = 6m

Step-by-step explanation: