alleryকোন বীজগাণিতিক রাশিমালাটি r ব্যাসার্ধবিশিষ্ট একটি গোলকের সমগ্র বহিঃস্থ ক্ষেত্রফল গণনা করে?
A2pi * r^2
B4pi * r^2
C(4/3)pi * r^3
D(2/3)pi * r^3
Answer & Solution
Correct answer: B. 4pi * r^2
r ব্যাসার্ধবিশিষ্ট একটি গোলকের সমগ্রতলের ক্ষেত্রফল 4 * pi * r^2 দ্বারা দেওয়া হয়।
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