A) 194.04 cu.dm
B) 19.404 cu.dm
C) 1940.4 cu.dm
D) 19404 cu.dm
Correct Answer: B
Solution :
[b] Volume of right circular cone \[=\frac{1}{3}\pi \,{{r}^{2}}h\] Cone radius \[=\frac{4.2}{2}=2.1\,\,dm\] Cone height \[=4.2\,\,dm\] So volume of cone \[=\,\frac{1}{3}\times \frac{22}{7}\times {{(2.1)}^{2}}\times (4.2)\] \[=19.404\,\,d{{m}^{3}}.\]
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