solution and mixture

Q1. How much pure alcohol can be added to 400ml of a 15% solution to make its strength 32%
a. 100 ml
b. 60 ml
c. 120 ml
d. 150 ml
e. None of the above

Q2. How much water can be added to 400ml of a 32% solution to make its strength 15%
a. 100 ml
b. 60 ml
c. 120 ml
d. 150 ml
e. None of the above

Q3. Price of pure alcohol is Rs .200 /lt . If a trader sells an impure version of the same alcohol by mixing it with water, at 20% discount and gets a profit of 10% then amount of water mixed per 1 lt of pure alcohol is
a.  Less than 100ml
b. In between 100ml to 200 ml
c. In between 200ml to 300 ml
d. More than 300 ml
e. None of the above


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ans

ans 1-a
ans 2-d
ans 3-b

Little Star

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