A) 16
B) 21
C) 61
D) 81
Correct Answer: A
Solution :
In figure \[A:12\times \frac{14}{2}=12\times 7=84\] In figure \[B:9\times \frac{18}{2}=9\times 9=81\] \[\therefore \]In figure\[C:11\times \frac{x}{2}=88\]
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