IGDTUW 2025 — Reasoning PYQ

Solution:

Initial mix: Milk $=\frac{2}{3}\times 60=40$L, Water $=20$L.

Target ratio: $1:2$. Since we only add water, milk remains $40$L

In the new ratio, $1\text{ unit}=40$L (milk).

Therefore, $2\text{ units}=80$L (water).

Water to be added $=80\text{L}-20\text{L}=60\text{L}$.

Correct Option: (c)