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If x is the square of the number when `(2/5 of 6 1/4 div 3/7) of 1 2/7` is divided by `11 1/4`, then the value of 81x is:
यदि x संख्या का वर्ग है जब `(2/5 of 6 1/4 div 3/7) 1 2/7` को `11 1/4` से विभाजित किया जाता है, तो 81x का मान होता है:

A

36

B

16

C

9

D

4

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