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A wooden article was made by scooping out a hemisphere from each end of a solid cylinder. If the height of the cylinder is 10cm and its base is of radius 3.5cm.Find the total surface area of the article?

Posted by Youngjae Namdol 6 years, 6 months ago

CBSE > Class 10 > Mathematics

1 answers

Sia ? 6 years, 6 months ago

TSA of the article = 2{tex}\pi{/tex}rh + 2(2{tex}\pi{/tex}r²)
= 2{tex}\pi{/tex} (3.5)(10) + 2[2{tex}\pi{/tex} (3.5)²]
= 70{tex}\pi{/tex} + 49{tex}\pi{/tex}
= 119 {tex}\pi{/tex}
= 119 {tex}\times{/tex} {tex}\frac {22}7{/tex}
= 374 cm²

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