A silver ornament is suspected to be hollow. Its weight is 250 gms and it displaces 50 cm3 of water. If the density of silver is 10 g/cm³ find the volume of the cavity.

weight=250g

volume displaced=weight of floating object=50g

therefore weight of hollow cavity=250g-50g

                                                          =200g

density=10g/cm3

p=m/v

p*v=m

v=m/p

v=200/10

v=20cm3