SSC CGL 2025 PYQ — Question 81

The correct answer is option 4 i.e. 10 L.

Total solution = 40 L

Ratio (acid : water) = 5 : 3

Acid = ${5\over 8}$ × 40 = 25 L

Water = ${3\over 8}$ × 40 = 15 L

To make ratio 1 : 1, water must be equal to acid = 25 L

So, extra water needed = 25 − 15 = 10 L