An Iron Block of Density $\rho$ _Fe and of Volume L³ Is Immersed in a Fluid

Multiple Choice

An iron block of density $\rho$ _Fe and of volume l³ is immersed in a fluid of density $\rho$ _fluid.The block hangs from a scale which reads W as the weight.The top of the block is a height h below the surface of the fluid.The correct equation for the reading of the scale is

A) W = ( $\rho$ _Fe- $\rho$ _fluid) ghl².
B) W = ( $\rho$ _fluid - $\rho$ _Fe) gl³.
C) W = ( $\rho$ _Fe - $\rho$ _fluid) gl³.
D) W = ( $\rho$ _Fe + $\rho$ _fluid) ghl².
E) W = ( $\rho$ _Fe + $\rho$ _fluid) gl³.