A) 20 cm
B) 21 cm
C) 28 cm
D) 24 cm
Correct Answer: B
Solution :
Volume of the cone = Volume of the cylinder \[\Rightarrow \] \[\frac{1}{3}\pi {{r}^{2}}{{h}_{1}}=\pi {{r}^{2}}{{h}_{2}}\] \[\Rightarrow \] \[{{h}_{1}}=3{{h}_{2}}=3\times 7=21\,cm.\]You need to login to perform this action.
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