Question

The average density of human blood is 1060 kg/m³. What is the mass of blood in a person who has a blood volume of 0.00457 m³? Report your answer in units of kilograms and in units of pounds.

kg

lb

Answer 1

Given the density of human blood, d = 1060 kg/m3.

Given the volume of blood in a person, V = 0.00457 m3.

Now the mass of blood in the person can be calculated from the following formulae

Mass, m = Vxd =  0.00457 m3 x1060 kg/m3 = 4.84 Kg (answer)

The mass of blood in terms of pound can be calculated from the following unit conversion

1 Kg = 2.2046 lb

or 2.2046 lb / 1 Kg = 1

Hence mass, m = m = Vxd =  0.00457 m3 x1060 kg/m3 =  0.00457 m3 x1060 kg x (2.2046 lb / 1 Kg ) /m3

=> m = 10.7 lb (answer)