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#1 2009-11-13 21:46:49
- shivusuja
- Member
- Registered: 2006-09-14
- Posts: 56
Algebra
PLEASE HELP ME OUT WITH THE SUM
HOW MUCH SALT MUST BE ADDED TO 60Kg OF A 20% SOLUTION OF SALT TO INCREASE IT TO A 40% SOLUTION OF SALT?
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#2 2009-11-13 22:38:34
- Identity
- Member
- Registered: 2007-04-18
- Posts: 934
Re: Algebra
If 60kg solution contains 20% of salt then there is 0.2×60 = 12kg of salt initially.
If you add x kg of salt, the total weight is (60+x) kg and the amount of salt is (12+x) kg.
So we need:
Solving, we get x = 20, so we must add 20kg of salt.
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