A wooden article was made by scooping out a hemisphere from each end of a cylinder. If the height of the cylinder is 20cm and radius of the base is 3.5cm find the total surface area of the article
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Step-by-step explanation:
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Answer:
Step-by-step explanation:
csa of cylinder = 2πrh
= 2 × 22/7 × 3.5 × 20
= 2 × 22 × 10
= 440 cm²
csa of 2 hemispheres = 2πr²
= 2 × 22/7 × 3.5 × 3.5
= 2 × 22 × 0.5 × 3.5
= 77 cm²
total surface area of article = csa of cylinder + csa of hemisphere
= 440 + 77 cm²
= 517 cm²
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