alleryखंयचो बीजगणितीय अभिव्यक्ती r त्रिज्याच्या गोलाक मर्यादा घालपी वट्ट भायलो क्षेत्रफळ मेजता?
A2pi * आर ^ 2
B4pi * आर ^ 2
C(4/3)पी * आर ^ 3
D(2/3)पी * आर ^ 3
Answer & Solution
Correct answer: B. 4pi * आर ^ 2
r त्रिज्या आशिल्ल्या गोलाचें पृश्ठभागाचें क्षेत्रफळ 4 * pi * r^2 अशें दितात.
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