Question

Water has a density of 1.0g/cm3. Aperson sits in a bath 150cm in length and 90 cm width. Thw water had a depth of 60cm befor the person sat in the bath. after sitting in the bath the water level rose to 68cm.
Calculate the mass of the person, giving your answer in kg.
well, the volume of water displaces is 150*90*8 cm^3

If the person is floating, her mass is the same as the water displaced.

If the person is submerged completely, her volume is the same as that of the water. So, if you know the person's density, that can be used.

If neither, then we have nothing to go on at all.

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