The number of kilograms of water in the human body varies dirctly as the mass of the body. An 84-kg person contains 64-kg of water. How many kg of water is in a 63-kg person?

Answer 1

water = k(mass) , where k is a constant
given water = 64 kg when mass = 84 kg
64 = k(84)
k = 64/84 = 16/21

water = (16/21)(mass)
when mass = 63
water = (16/21)(63) = 48 kg

Answer 2

80.try doing it. It easy

Answer 3

The number of kilograms W of water in a human varies directly to the mass of the body. A 96_kg person contains 64 kg of water. How many kilograms of water are in a 60_kg person?