Question

IF IN 30 LITERS MIXTURE OF MILK AND WATER THE RATIO OF MILK AND WATER IS 7:3 THE QUANTITY OF WATER TO BE MIXED IN ORDER TO MAKE THIS RATIO 3:7 IS

Answer 1

intial ratio 7:3
quantity 21 & 9
final ratio 3:7
21 & 49
water to be mixed 49-9=40 litres
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