Mathematics · Mensuration
एक 35 सेमी × 7 सेमी की आयताकार पट्टी को उसकी लंबी भुजा के परितः घुमाकर एक बेलन बनाया जाता है। इस प्रकार उत्पन्न ठोस का कुल पृष्ठीय क्षेत्रफल ज्ञात कीजिए। (π = 227 का प्रयोग करें)
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