alleryr ব্যাসাৰ্ধৰ এটা গোলকক আৱৰি থকা মুঠ বাহ্যিক পৃষ্ঠকালি কোনটো বীজগণিতীয় ৰাশিয়ে গণনা কৰে?
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 ব্যাসাৰ্ধযুক্ত এটা গোলকৰ পৃষ্ঠকালি 4 * pi * r^2 ৰ দ্বাৰা পোৱা যায়।
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