Promise rings meaning is a symbol of commitment and is often seen as a pre-engagement rings. However, it can be given for many different reasons, such as a symbol of chastity, loyalty, monogamy, friendship, or even a promise to oneself to stay clean and sober.
Length times width gives the surface area of the pool. Multiplying that by the average depth gives the volume in cubic feet. Since there are 7.5 gallons in each cubic foot, multiply the cubic feet of the pool by 7.5 to arrive at the volume of the pool (expressed in gallons).
Volume is dependant on size. Litres are a measure of volume. Fill a bathtub to the top, then submerge the human body in it. Capture the water that is displaced, and measure the volume to find out how many litres for that particular human body. 46 litres of water in the average adult human body. 5 litres of blood in the same.