allery7 cm ব্যাসাৰ্ধ আৰু 5 cm উচ্চতাৰ এটা ড্ৰামৰ বক্ৰ পৃষ্ঠৰ কালি কিমান? (pi = 22/7)
A154 sq cm
B440 sq cm
C110 sq cm
D220 sq cm
Answer & Solution
Correct answer: D. 220 sq cm
বক্ৰ পৃষ্ঠৰ কালি হৈছে 2 pi r h = 2 x 22/7 x 7 x 5 = 220 বৰ্গ ছেন্টিমিটাৰ।
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