A wooden article was made by scooping out a hemisphere from each end of a solid cylinder, if the height of the cylinder is 10 cm, and its base is of radius 3.5 cm , find the total surface area of the article.
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Answered by
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We have
Height of cylinder= 10cm
radius of base= 3.5cm
Total surface area of the article =Curved surface area of the cylinder +2 surface area of a hemisphere
=2πrh+2(2πr
2
)
=2πr(h+2r)
=2×
7
22
×3.5(10+2×3.5)cm
2
=374cm
2
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