Question

Question #15216

Answer 1

90 L of water will reduce to 30% acid concentration

Explanation:

90L (60%) + xL(0%) = (90 + x)L(30%)

this equation includes the volume and acid proportion

the acid equation is:
54 L + x(0) = 27 L + 0.30x L
Since all terms are in Litres, we can dispense with the units
54 = 27 + 0.30x
subtracting 27 from both sides:

27 = 0.30x
divide both sides by 0.3
90 = x