The funnel of tin sheet consist of a cylindrical portion 10 cm long attached to a frustum of a cone. if diameter of the top and bottom of the frustum is 18 cm and 8 cm respectively and the sorry
slant height of the frustum of a cone is 13 cm. find the surface area of the tin required to make the funnel.
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The answer is 249π cm^2
The following are the steps::-
CSA of cylinder = 2πrh
= 2 x π x 4 x 10
= 80π
CSA Of frustum = π(r1 + r2)l
= π ( 9 + 4)13
= π x 13 x 13
= 169π
TSA of funnel = CSA of cylinder + CSA of frustum
= 80π + 169π
= 249π
Therefore the surface area of funnel is 249π cm²
HOPE IT HELPS YOU!!
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