Correct Answer - the packet will sink . The , mass of water displaced is 350 g.
Density of the 500 g sealed packet= Mass of the Packet/Volume of the Packet
= 500/350
=1.428 g `cm^(-3)`
The density of the substance is more than the density of water (1 g cm) Hence, it will sink in water.
The mass of water displaced by the packet is equal to the volume of the packet, i e., 350 g.