Volume of cylindrical jar = 150 cm³
volume of water that still remains in the jar = 2/3rd
1/3 rd of water that was drained out
According to archimedes principle, volume of water that was drained out is equal to volume of the object immersed in the water.
volume of cone = 1/3rd of the volume of cylinder
volume of cone = 150 ×
volume of cone = 50 cm³