Question

If one cube is removed, the water level would drop to 25 ml. How many ml of water is actually present in the beaker?

• A. 30
• B. 25
• C. 20
• D. 15

Answer 1

The correct option is C 20

The water level drops to 25 ml from 30 ml mark if one cube is removed.
So, Volume of 1 cube = 30 - 25 = 5 ml
Volume of 2 cubes = 2 $\times$ 5 = 10 ml

So, the actual volume of the water in the beaker = 30 - 10 = 20 ml.