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How many litres of water will have to be added to 1125 litres of the 45% solution of acid so that the resulting mixture will contain more than 25% but less than 30% acid content?

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Correct Answer - More than 300 litres but less than 480 litres
Let x litres of water may be added. Then,
`rArr 2xlt2560and4x gt1280 rArr 320 ltxlt1280`.
`rArr(600+x)/(4)lt270lt(1800+3x)/(10)`
`rArr(600+x)/(4)lt270and(1800+3x)/(10)gt270`
`rArr 600+xlt1080and 1800 +3xgt2700 rArr300ltxlt480`.

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