1.

The product of 5% of a positive number and 3% of the same number is 504.6 . What is half of that number ?A. 290B. 340C. 680D. 580

Answer» Correct Answer - A
(a) Let the positive number be x
Then, `(5x)/(100)xx(3x)/(100)=504.6`
`:. (15x^(2))/(10000)=504.6`
`or , x^(20)=(504.6xx10000)/(15)`
`:. X=580 " ":.` Half of number =290


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