The square of a positive number is 2000% greater than the number itself, then the square
Posted on 27-12-2022
Ques - The square of a positive number is 2000% greater than the number itself, then the square of that number is :
A. 1762
B. 1635
C. 441
D. 139
Solution -
Let,
The positive number = x
Square of a positive number = x + (2000/100)x
x² = x + 20x
x² = 21x
x² - 21x = 0
Here,
x can be 0 and 21.
But x = 0 can't be possible.
Therefore,
x = 21 can be possible.
Therefore,
The positive number is 21.
And
The square of positive number = (21)²
The square of positive number = 441.
Hence,
The correct answer is option (c) 441.
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