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From a circular sheet of paper of radius 25 cm,a sector area 4% is removed.if the remaining part is used to make a conical surface,then the ratio of the

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SEE Diagram when circular area of r =25cm is folded
into a cone, the lateral length L of cone is = 25cm. as cone is formed
by joining along the cuts. Side Length of the cut is radius of circle.

Remaining Area of the circle of 25cm radius becomes the lateral area of the cone. R is radius of base circle of cone.

So 0.96 π 25² = π R L = π R 25 So R = 24
cm.

Height² = L² - R² This is because R L H form a pythagorus triangle.