There is some water in a jug. 1 kg of weight raises the level of water by 3 cm.
What level of water will rise if 4 kg of weight is put inside the jug filled with water?

Rise in water when 1 kg of weight is put inside the jug = 3 cm
Rise in water when 4 kg of weight is put inside the jug = 4 × 3 cm = 12 cm

Thus, the level of water will rise by 12 cm when 4 kg weight is put inside the jug filled with water.