In a mixture of 20 litres, the ratio of milk and water is 2:1. What amount of water must be added to make the ratio of milk and water as 1:2
Answers
Answer:
Use concept of Alligations.
The concentration of water in solution is 1/3 and concentration of water in pure water to be added is 1.
Further, required concentration of water in final mixture is 2/3.
Sol - - - - - - - - -pure water
1/3 - - - - - - - - - - - - 1
- - - - - - - 2/3 - - - - -
1/3 - - - - - - - - - - - - 1/3
Ratio of water in milk solution : water = 1/3:1/3
= 1:1
Water content in original solution = 30 L
> Pure water to be added = 30 L
:-)
Answer:
20
Step-by-step explanation:
Let water added be x.
Currently, 20 litres has 2:1 milk:water
=> Milk = 2/3*20=40/3
=> Water = 1/3*20=20/3
New mixture
milk=40/3
water=20/3+x
new ratio milk:water= 1:2
therefore (40/3)/(20/3+x)=1/2
=> 40/3/(20+3x)/3=1/2
=>40/20+3x=1/2
20+3x=80
3x=60
x=20
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