alleryਕਿਹੜਾ ਬੀਜਗਣਿਤਿਕ ਪ੍ਰਗਟਾਵਾ r ਦੇ ਘੇਰੇ ਵਾਲੇ ਗੋਲੇ ਨਾਲ ਜੁੜੇ ਕੁੱਲ ਬਾਹਰੀ ਖੇਤਰ ਦੀ ਗਣਨਾ ਕਰਦਾ ਹੈ?
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
ਰੇਡੀਅਸ r ਵਾਲੇ ਗੋਲੇ ਦਾ ਸਤਹ ਖੇਤਰਫਲ 4 * pi * r^2 ਦੁਆਰਾ ਦਿੱਤਾ ਜਾਂਦਾ ਹੈ।
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