Mathematics · Mensuration
एक खोखले बेलनाकार पाइप का बाहरी व्यास 16 सेमी और आंतरिक व्यास 12 सेमी है। यदि पाइप की लंबाई 35 सेमी है, तो पाइप का कुल पृष्ठ क्षेत्रफल ज्ञात कीजिए। [π = 227 का उपयोग करें]
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