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