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Diameter of funnel = 14 cm
Radius of funnel = 14/2 = 7 cm
Diameter of cylindrical portion = 2 cm
Radius of cylindrical portion = 1 cm
Height of frustum = 11 - 8 = 3 cm
Slant height l = √h² + (R² - r²)
=> √3² + (7 - 1)²
=> √9 + 36
=> √45
=> 6.70 cm
CSA of frustum = πl(R + r)
=> 22/7 * (6.70) * (7 + 1)
=> 168.45 cm²
Height of cylinder = 8 cm
CSA of cylinder = 2πrh
=> 2 * (22/7) * 1 * 8
=> 50.28 cm²
Area of tin required = 168.45 + 50.28
=> 218.73 cm²
#BeBrainly
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218.73
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