A) \[420\text{ }c{{m}^{2}}\]
B) \[550\text{ }c{{m}^{2}}\]
C) \[~460\text{ }c{{m}^{2}}\]
D) \[~580\text{ }c{{m}^{2}}\]
Correct Answer: B
Solution :
Slant height\[l=25\,cm\] Radius of the base cone, \[r=7cm\] C.S.A \[cone=\pi rl\] \[=\frac{22}{7}\times 7\times 25c{{m}^{2}}=550\,c{{m}^{2}}\]
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