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Question

If the height of a bucker in the shape of frustum of a cone is 16 cm and the diameters of its two circumends are 40 cm and 16 cm,then its slant height is

A
20 cm
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B
125 cm
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C
813 cm
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D
16 cm
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Solution

The correct option is A 20 cm
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 402162=208=12

Hence, According to Pythagoras theorem
SH2=162+122
=400
SH=400 cm=20 cm

1168125_1131463_ans_b2895b4d18da4f3c9bbd8df94274f46b.png

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