Question

20. A wooden article was made by scooping out a
hemisphere from each end of a cylinder, as shown in
the figure. If the height of the cylinder is 20 cm and its
base is of diameter 7 cm, find the total surface area of
the article when it is ready.
​

Answer 1

Answer:

374cm^2

Step-by-step explanation:

REF.Image

C.S.A of cylinder = 2πrh

⇒ Total S.A =2πrh+(2×2πr2)

=2πr(h+2r)

=2×22/7×7/2(10+7)

=22×17=374cm^2

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