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मिनिट काटा 90° फिरतो. किती वेळ उलटून गेला आहे?

A30 min
B10 min
C15 min
D20 min
Answer & Solution
Correct answer: C. 15 min
दर मिनिटाला 6° याप्रमाणे 90° साठी 15 मिनिटे लागतात.
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