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प्रश्न
The given figure shows a solid cylinder of height h cm and radius r cm. If the slant height of the conical cavity is l cm, the total surface area of the remaining solid is:
विकल्प
πrl + 2πrh + 2πr2
πr2+ πrl + 2πrh
2πr2 − πrl + 2πrh
(πrl + πr2) + 2r2 + 2πrh
MCQ
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उत्तर
πr2+ πrl + 2πrh
Explanation:
From figure,
Total surface area of remaining solid = Curved surface area of cylinder + Area of upper surface of cylinder + Curved surface area of cone
= 2πrh + πr2 + πrl
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