Mathematics · Mensuration
400π सेमी2 पृष्ठ क्षेत्रफल वाली मोम की एक ठोस सजावटी गेंद को पिघलाकर 30 सेमी ऊँचाई वाली एक बेलनाकार मोमबत्ती में ढाला जाता है। गेंद की त्रिज्या का मोमबत्ती की आधार त्रिज्या से अनुपात क्या है?
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