A) 3.6
B) 4.8
C) 6.4
D) 7.2
Correct Answer: C
Solution :
[c] Let the height of the new cone be h cm. Then, \[\frac{1}{3}\pi \times 1.6\times 1.6\times 3.6=\frac{1}{3}\pi \times 1.2\times 1.2\times h\] \[\Rightarrow \] \[h=\frac{1.6\times 1.6\times 3.6}{1.2\times 1.2}=6.4\,cm\] |
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