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The simple interest at x% for x years will be Rs x on a sum of ....

Rs x
Rs 100x
Rs (100/x)
Rs (100/ x2)

Correct Answer: Rs (100/x)

Explanation:

As Sum = [(100 x SI)/(Time x Rate)]
here, let R =x%, T=x yr, and, SI=Rs x
∴ Sum=[(100 × x)/(x × x)]
=(100/x)

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