Mathematics · Mensuration
एक खोखले बेलनाकार पाइप का बाहरी और आंतरिक व्यास क्रमशः 14 सेमी और 12 सेमी है। यदि पाइप की ऊंचाई 21 सेमी है, तो पाइप बनाने में उपयोग किए गए लोहे का आयतन कितना है? (π = 227 का उपयोग करें)
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