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x litres of water are added to 1125 L of 45% acid so the acid is between 25% and 30%. Find x.
A450 < x < 900
B225 < x < 562.5
C562.5 < x < 900
D562.5 < x < 1125
Answer & Solution
Correct answer: C. 562.5 < x < 900
The acid is 506.25 L, so 506.25/(1125 + x) must lie between 0.25 and 0.30, giving 562.5 < x < 900.
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