The positive number = x
Square of a positive number = x + (2000/100)x
x² = x + 20x
x² = 21x
x² - 21x = 0
x can be 0 and 21.
But x = 0 can't be possible.
x = 21 can be possible.
The positive number is 21.
The square of positive number = (21)²
The square of positive number = 441.
The correct answer is option (c) 441.Thank You
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