A) 8
B) 10
C) 14
D) 18
E) None of these
Correct Answer: B
Solution :
Explanation Option (b) is correct. \[\frac{4}{2}\pi {{5}^{3}}+\frac{4}{3}\pi {{.8}^{3}}+\frac{4}{3}\pi {{R}^{3}}=\frac{4}{3}\pi {{(12)}^{3}}\] \[\therefore 125+512+{{R}^{3}}=1728\] \[{{R}^{3}}=1091\] \[\therefore \] R = 10 (approx.)You need to login to perform this action.
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