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r त्रिज्या वाले एक ठोस गोले को पिघलाकर r ऊँचाई के एक ठोस शकु क आकार में ढाला जाता है। शंकु के आधार की त्रिज्या है:

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r त्रिज्या वाले एक ठोस गोले को पिघलाकर r ऊँचाई के एक ठोस शकु क आकार में ढाला जाता है। शंकु के आधार की त्रिज्या है:
A. 2r
B. 3r
C. r
D. 4r
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Correct Answer - A
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