A) 81
B) 90
C) 80
D) 91
Correct Answer: B
Solution :
Let x be the number of soldiers in each row. To form a perfect square, number of soldiers in each row must be equal to the number of rows. According to question, Number of soldiers who form square =8160-60=8100 \[\therefore \text{ }x\times x=8100\] \[\Rightarrow {{x}^{2}}=8100\Rightarrow x=90\] \[\therefore \] Number of soldiers in each row \[=90\]You need to login to perform this action.
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