If the specific gravity of a fuel is 0.7, how much will 100 Imperial Gallons of it weigh?

To determine the weight of a fuel given its specific gravity and volume, it is important to understand what specific gravity represents. Specific gravity is the ratio of the density of a substance to the density of a reference substance, typically water for liquids. The specific gravity of 0.7 indicates that the fuel is less dense than water.

Water's density is approximately 62.4 lb per cubic foot or about 8.34 lb per gallon. To find the weight of the fuel:

1. First, convert the volume from Imperial gallons to pounds. Since an Imperial gallon of water weighs about 10 lb (using the conversion factor of 8.34 lb for US gallons, approximately 1 Imperial gallon is 1.2 US gallons, leading to around 10 lb for Imperial gallons), we apply the specific gravity:

Weight of fuel = Volume × Weight of 1 Imperial gallon of water × Specific Gravity

Weight of fuel = 100 gallons × 10 lb/gallon × 0.7

Weight of fuel = 1000 lb × 0.7

Weight of fuel = 700 lb.

This method highlights the correct answer accurately, showing that the fuel weighs 700 lb when considering its