An iron block of density ?Fe and of volume l3 is immersed in a fluid of density ?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 = (?Fe ? ?fluid)ghl2.
b. w = (?fluid ? ?Fe)gl3.
c. w = (?Fe ? ?fluid)gl3.
d. w = (?Fe + ?fluid)ghl2.
e. w = (?Fe + ?fluid)gl3.
c
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