Q84 of 189 Page 512

The largest possible right circular cone is cut out of a cube of edge cm. The volume of the cone is

True


The dimensions of the cone are
diameter = r ; radius = r/2 height = r
Volume of a cone



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82

The question consists of two statements, namely, Assertion (A) and Reason (R). Please select the correct answer.











Assertion (A)



Reason (R)



The curved surface area of a cone is and its diameter is 14 cm. Then, its slant height is 25 cm.



The curved surface area of a cone having base radius and slant height is


83

A right circular cylinder just encloses a sphere of radius (as shown in the figure). Then, the surface area of the sphere is equal to the curved surface area of the cylinder.

 85

If a sphere is inscribed in a cube, then the ratio of the volume of the cube to the volume of the sphere will be

86

If the length of diagonal of a cube is then the length of each edge of the cube is 3 cm.