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r = 7 cm आणि h = 3 cm (pi = 22/7) असलेल्या एका बंद डब्याचे एकूण बाह्य पृष्ठफळ शोधा.

A352 sq cm
B220 sq cm
C308 sq cm
D440 sq cm
Answer & Solution
Correct answer: D. 440 sq cm
बाजूचे 2 pi r h = 132 अधिक दोन तळ 2 pi r squared = 308 मिळून 440 square centimetres येते.
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