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5.5 सेमी x 10 सेमी x 14 सेमी के एक घनाभ को पिघलाकर 1.75 सेमी व्यास तथा 2 मिमी मोटाई के कितने सिक्के बनाये जाते हैं?

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घनाभ का आयतन = 5.5 x 10 x 14 = 770 सेमी3

सिक्के का व्यास = 1.75 सेमी

सिक्के की त्रिज्या r = 1.75/2 सेमी

सिक्के की मोटाई h = 2 मिमी = 2/10 = 0.2 सेमी

तब, एक सिक्के का आयतन = πr2h

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