A wooden articles was made by scooping out a hemisphere from each end of a solid cylinder, as shown in figure. If the height of the cylinder is 10cm, and its base is of radius 3.5cm, find the total surface area of the article.
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Given, height of the cylinder h=10cm
Radius of base r=3.5cm
Curved surface area of cylinder = 2πrh
Curved surface area of hemisphere =2πr2
⇒ Total S.A =2πrh+(2×2πr2)
=2πr(h+2r)
=2×227×3.5×(10+2×3.5)cm2
=44×0.5×(10+7)cm2
=22×17cm2
=374cm2
Hence, the required area is 374cm2
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