Question

what is the radius and the csa of the circle of a cone made from a quadrant of a circle of radius 28cm

Answer 1

Solution:-
Radius of the quadrant of circle = 28 cm
CSA of the cone = Area of quadrant of circle
Area of the quadrant of circle = 1/4*πr²
= 1/4*22/7*28*28
=  616 sq cm = CSA of the cone also.
Curved surface area of the cone = πrl, where 'r' is the radius and 'l' is slant height of the cone.
Radius of the quadrant of the circle = slant height of the cone
CSA = 22/7*r*28
616 = 22/7*r*28
r = (616*7)/(22*28)
r = 4312/616
r = 7 cm
So, the radius of the cone is 7 cm.
Answer.

Answer 2

Answer:

radius is 7 cm and csa of circle of a cone is 616 cm^2

Step-by-step explanation:

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