A wooden article was made by scooping out of a hemisphere from each end of solid cylinder. if the height is the cylinder is 20cm and radius of the base is 3.5cm,find the total surface area of the article.
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Answer:
Height of cyclinder = 20 cm.
Radius of cylinder = 3.5 cm = Radius of each hemisphere.
TSA of the article = 2×CSA of hemisphere×CSA of cylinder.
2×2×pie×r^2+2pie×r×h=2×pie×r(2r+h)
2×22/7×3.5(2×3.5+20)
44×0.5(7+20)
44×0.5×27 cm^2
=594.0cm^2
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