The weight of 10 gallons of water depends on its temperature (since water density changes slightly with temperature), but at standard conditions (around 70°F or 21°C), water weighs approximately 8.34 pounds per gallons.
Calculation:
10 gallons × 8.34 pounds per gallon= 83.4 pounds
So, 10 gallons of water weigh about 83.4 pounds.