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ഒരു വൃത്തത്തിന്റെ ചുറ്റളവ് 30π. അതിന്റെ വിസ്തീർണ്ണം എന്താണ്?

A225π

B300π

C400π

D900π

Answer:

A. 225π

Read Explanation:

ചുറ്റളവ് =30π ⇒ 2πr =30π ⇒ r = 15 വിസ്തീർണ്ണം = πr² =π(15 × 15) =225π


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