A) 9 cm
B) 18 cm
C) 32 cm
D) 50 cm
E) None of these
Correct Answer: A
Solution :
\[b=2h:A=b\times h=2{{h}^{2}}=162\,\,c{{m}^{2}}\] \[\Rightarrow \]\[{{h}^{2}}=81\Rightarrow h=9\Rightarrow b=2h=18\,\,cm\]
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