Question

Believing that 70% of her body is composed of water, and 20% is composed of denser materials (bones, teeth, etc.) with a specific gravity of 1.25, what is the specific gravity of the remaining 10% of her body/internal composition? (Specific gravity is just the ratio of density of a material to water. Thus, a specific gravity of 1.25 corresponds to a density of ????m???????? = 1.25????????????????????????.)

Answer 1

s = 0.5

Step-by-step explanation:

We know that specific gravity of water is 1.

Mass = Density x Volume

70% of her body is composed of water, it means that it have

m₁= 70 x 1 = 70

20% is composed of denser materials with a specific gravity of 1.25

m ₂= 20 x 1.25 = 25

Lets take remaining 10 % have 's' specific gravity

m₃ = 10 x s

So

100 = m₁ + m ₂+ m₃

100 = 70 + 25 + 10 s

100 - 95 = 10 s

s = 0.5