A sample of milk contains 5% water. What quantity of pure
milk should be added to 10 litres of milk to reduce the
water content to 2%?

(a) 5 litres

(b) 7 litres

(c) 15 litres

(d) 12 litres

(e) None of these

Answer Posted / bigdummy

10L * .05 = .5L water

(.5L water) = (.05)(10L total)
(.5L water) = (.02)(x L total)
x = .5L/.02 = 25L total

But we're looking for how much milk we have to add, so
25L total - 10L original = 15L pure milk

Is This Answer Correct ?    74 Yes 9 No



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