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11
A circular cone is cut by a plane parallel to the base and the conical portion is removed
15
in the curved surfa

By Adalynn

11
A circular cone is cut by a plane parallel to the base and the conical portion is removed
15
in the curved surface area of the frustum is
of the curved surface area of the
whole cone, prove that the height of the frustum is
of the height of the whole cone​

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Adalynn

11. A person stands at a window on the 9th floor of an office building. He measures the angle of
elevation to be 25 and the a

If the ratio of the sum of first n terms of two APs is (7n + 1) : (4n + 27), then find the ratio of their 9th terms.

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