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Volume of Combined Solids

The shaded po...

Question

The shaded portion is cut out from the circle, and then the remaining portion is folded to make a cone. Now, if the bottom of the cone is covered with paper to form the base, what will be the ratio of the area of original circle to the total surface area of the cone made?

A

1 : 1

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B

9 : 16

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C

21 : 16

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D

16 : 21

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Solution

The correct option is D $16 : 21$

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