Question

A vessel full of water weighs 40 kgs. if it is half filled, its weight is 30 kgs. find the weight of the empty vessel

Answer 1

Vessel + full amount of water = 40 kg

Vessel + half amount of water = 30 kg

Find the weight of the water being pour out:

half amount of water = 40 - 30 = 10kg

Find the weight of the full amount of the water:

full amount of  water = 10 x 2 = 20 kg

Find the weight of the empty vessel:

Vessel = 40 - 20 = 20 kg

Answer: The empty vessel is 20 kg

Answer 2

Full vessel, 40 kg.

Half-full vessel, 30 kg.

Amount of water for half full is 40-30=10 kg.  

The amount of water is TWO halves so 10+10=20 kg. is the amount of water that the full vessel holds.  

If v is weight of the vessel, and 20 is the weight of just the water, then 20+v=40. Solving for v, find v=40-20,    v=20 kg.  

so i hope 20 kg is correct answer........

The vessel is 20 kg.