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Write the foumula to calculate the curve...

Write the foumula to calculate the curved surface area of the frustum of a cone .

A

`pi _(1) (r_(1)+r_(2))1`

B

`pi_(1)(r_(1)+r_(2))h`

C

`pi_(1) (r_(1)-r_(2))l`

D

`pi_(1)(r_(1)-r_(2))h`

Text Solution

Verified by Experts

The correct Answer is:
A
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