किसी गोले की त्रिज्या दो गुनी की जाये, तब सम्पूर्ण पृष्ठ क्षेत्रफल कितना गुना हो जाऐगा?A. doubleB. three timesC. Four timesD. None of the mentioned

किसी गोले की त्रिज्या दो ग�

1.	किसी गोले की त्रिज्या दो गुनी की जाये, तब सम्पूर्ण पृष्ठ क्षेत्रफल कितना गुना हो जाऐगा?A. doubleB. three timesC. Four timesD. None of the mentioned
Answer» Correct Answer - C Let the original radius be `r` `implies` Area `=4pir^(2)` New area `=4pi(2r^(2))=16pir^(2)` `implies` New area of 4 times the old area

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किसी गोले की त्रिज्या दो गुनी की जाये, तब सम्पूर्ण पृष्ठ क्षेत्रफल कितना गुना हो जाऐगा?A. doubleB. three timesC. Four timesD. None of the mentioned

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