alleryవ్యాసార్థం r కలిగిన గోళాన్ని ఆవరించి ఉండే మొత్తం బాహ్య వైశాల్యాన్ని ఏ బీజగణిత సమాసం లెక్కిస్తుంది?
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
వ్యాసార్థం r కలిగిన గోళం యొక్క ఉపరితల వైశాల్యం 4 * pi * r^2 ద్వారా ఇవ్వబడుతుంది.
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