A vessel has $40$ litres of milk. After removing $10$ litres and replacing it with water once, the amount of milk left is:

Question

A vessel has $40$ litres of milk. After removing $10$ litres and replacing it with water once, the amount of milk left is:

Option A

25 litres

Option B — Correct answer

30 litres

Correct choice.

Option C

32 litres

Option D

35 litres

Explanation

Remaining fraction of milk $=\frac{30}{40}=\frac34$. Milk left $=40\times\frac34=30$ litres.

Chapter Mock 10: Mixture and Alligation