a wooden article was made by scooping out a hemisphere from each other end of a solid cylinder . if the height of the cylinder is 10 cm and its base is of radius 3.5 cm then find the total surface area of the article
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The Answer is.....
Given that,
Radius (r) of cylindrical part = Radius (r) of hemispherical part = 3.5 cm
Height of cylindrical part (h) = 10 cm
Surface area of article = CSA of cylindrical part + 2 x CSA of hemispherical part
= 2 π r h + 2 x 2 π r2
= 2 π x 3.5 x 10 + 2 x 2 π x 3.5 x 3.5
= 70 π + 49π
= 119 π
= 17 x 22 = 374 cm2
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hope it helps you
answer is 374cm2
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