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The semi vertical angle of a cone is 45^...

The semi vertical angle of a cone is `45^(@)`. The height of the cone is 20.025 cm. The approximate lateral surface area is

A

`401pisqrt2sq.cm`

B

`60pisq.cm`

C

`3.6pisq.cm`

D

`9045 pi sq. cm`

Text Solution

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The correct Answer is:
A
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