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प्रश्न
Work out the surface area of following shape (use π = 3.14).
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उत्तर
In the given figure, there is a cube of side 5 cm and a cylinder of height 20 cm and radius is 2 cm.
So, total surface area = surface area of the cube + curved surface area of cylinder
= 6(5)2 + 2π(2) × 20 ...`[(∵ "Surface area of cube" = 6a^2),(∴ "Surface area of cylinder" = 2 pirh)]`
= 150 + 80π
Total surface area = 150 + 251.2 = 401.2 cm2
Notes
In this question assume that cylinder is at end open.
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