alleryत्रिज्या r असलेल्या गोलाचे संपूर्ण बाह्य पृष्ठफळ काढण्यासाठी कोणती बीजगणितीय राशी वापरली जाते?
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
त्रिज्या r असलेल्या गोलाचे पृष्ठफळ 4 * pi * r^2 या सूत्राने दिले जाते.
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