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The total surface area of a frustum-shap...

The total surface area of a frustum-shaped glass nuber is `(r_(1)gtr_(2))`

A

`pir_(1)l +pi r_(2)l`

B

`pi l (r _(1) + r_(2)) +pir _(2)^(2)`

C

`1/3 pih r _(1)^(2) +r_(2)^(2)+r_(1)r_(2)`

D

`sqrt(h^(2) +(r_(1)-r_(2)^(2))`

Text Solution

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X BOARDS-CBSE BOARDS 2020-QUESTION
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