Mathematics · Mensuration
8.4 सेमी त्रिज्या वाले एक ठोस धातु के गोले को पिघलाकर 18.9 सेमी ऊंचाई का एक शंकु (cone) बनाया जाता है। शंकु के आधार की त्रिज्या (सेमी में) कितनी होगी?
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