Question

Four equal cones are prepared from each quadrant of a circle whose are ais 616sq.cm find radius of circle and each cone

Answer 1

Hiii friend...

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.

hope it helps you friend