If the height of a bucker in the shape of frustum of a cone is 16cm and the diameters of its two circumends are 40cm and 16cm,then its slant height is
A
20cm
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B
12√5cm
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C
8√13cm
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D
16cm
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Solution
The correct option is A20cm Let Slant Height be the Hypotenuse of a Imaginary Right angled Triangle whose height will be equal to that of the frustum and its base will be equal to 402−162=20−8=12