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If sqrt(. 04xx. 4xxa)=. 004xx. 4xxsqrt(b...

If `sqrt(. 04xx. 4xxa)=. 004xx. 4xxsqrt(b)` , then `a/b` is `16xx10^(-3)` (b) `16xx10^(-4)` (c) `16xx10^(-5)` (d) None of these

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