A) 12cm
B) 7cm
C) 14cm
D) 21cm
Correct Answer: C
Solution :
Volume of material of hollow sphere = Volume of external sphere - volume of internal sphere \[=2\pi rh\] Now, let the height of the cone be h cm. Volume of cone = Volume of material of hollow sphere \[=2\pi r(h+r)\] \[=\pi rl.\] \[l=\sqrt{{{h}^{2}}+{{r}^{2}}}\]You need to login to perform this action.
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