Question

300 gm of a salt solution has 40% salt in it. How much salt should be added to make it 50% of the solution?

• A. 40 gm
• B. 60 gm
• C. 70 gm
• D. 80 gm
• E. None of the above

Answer 1

The correct option is B 60 gm

The existing solution has 40% salt. More salt is to be mixed to make 100% salt solution. So, by alligation method:

$\therefore$ The two mixtures should be added in the ratio 5 : 1.
$\therefore$ Required salt $=\frac{300}{5}\times 1=60gm$