r = 7 cm এবং h = 3 cm বিশিষ্ট একটি বন্ধ ক্যানের সমগ্র বহিরাংশের ক্ষেত্রফল নির্ণয় করুন (pi = 22/7)।
A352 sq cm
B220 sq cm
C308 sq cm
D440 sq cm
Answer & Solution
Correct answer: D. 440 sq cm
পার্শ্বভাগ 2 pi r h = 132 এর সাথে দুটি ভূমি 2 pi r squared = 308 যোগ করলে 440 square centimetres হয়।
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