alleryr = 7 cm এবং l = 25 cm বিশিষ্ট একটি শঙ্কুর সমগ্রতলের ক্ষেত্রফল নির্ণয় করুন (pi = 22/7)।
A704 cm²
B858 cm²
C154 cm²
D550 cm²
Answer & Solution
Correct answer: A. 704 cm²
সমগ্রতলের ক্ষেত্রফল হলো pi r (l + r) = 22 x 32 = 704 square centimetres, বক্রতল 550 এবং ভূমির ক্ষেত্রফল 154-এর যোগফল।
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