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An oil funnel of tin sheet consists of a cylindrical portion \(10 \ cm\) long attached to a frustum of a cone. If the total height is \(22 \ cm\), the diameter of the cylindrical portion be \(8 \ cm\) and the diameter of the top of the funnel be \(18 \ cm\), then find the area of the tin sheet required to make the funnel.
Answer:
The area of the tin sheet required to make the funnel \(=\) \(cm^2\)
[Note: Round off your answer up to two decimal places.]
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