A hollow cone is cut by a plane parallel to the base and the upper portion is removed. If the curved surface of the remainder is 8/9 of the curved surface of the whole cone, find the ratio of the line segments into which the cone's altitude is divided by the plane.
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question is OK but I can't explain in mobile
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In the given figure angle B= angle D = 90 degree and AB=DE. Prove that CD = .BCin the given figure angle
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