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The total surface area of frustum shaped...

The total surface area of frustum shaped glass tumbler is `(r_1 (gt) r_2)`
(a) `pi r_1 l + pi r_2 l`
(b) `pi l (r_1 + r_2) + pi (r_2)^2`
(c) `1/3 pi h ( (r_1)^2 + (r_2)^2 + r_1r_2 )`
(d) `sqrt (h^2 + (r_1 - r_2)^2)`

A

`pi r_(2) 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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