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प्रश्न
The radius (in cm) of the largest right circular cone that can be cut out from a cube of edge 4.2 cm is
पर्याय
A. 4.2
B. 2.1
C. 8.4
D. 1.05
MCQ
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उत्तर
The height and diameter of the base of the largest right circular cone that can be cut out from a cube are equal to the edge of the cube.
Let the radius of the cone be r cm.
∴ 2r = 4.2 cm
`rArr r=4.2/2 cm =2.1 cm`
The correct answer is B
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