A jar contains 70 litres of a mixture of milk and
water containing 90% milk. Find the quantity (in
litres) of water to be added to the jar so that the
percentage of milk in the new solution is 85%.
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Answer:4.117 litre
Step-by-step explanation:
Present quantity of water is 70×10%= 7 liter
In new mixture milk should be 85% that means water should be 15%
Let the water to be mixed x liter
(70+x)×15% = 7+x
10.50+.15x = 7+x
10.50-7 = x-.15x
3.50 =.85 x
So x = 3.50/.85= 4.117 liter
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