Mathematics · Mensuration
लोहे का एक खोखला पाइप 21 सेमी लंबा है और इसका बाहरी व्यास 8 सेमी है। यदि पाइप की मोटाई 1 सेमी है और लोहे का भार 8 ग्राम/सेमी3 है, तो पाइप का भार कितना है? (π = 227 लीजिए)
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