Answer:
39.74 liters
Explanation:
Look up (on the Internet) the appropriate equivalence equation: gallons to liters or liters to gallons:
1 gallon = 3.785 liters.
Now multiply the quantity 10.5 gallons by the related conversion factor
3.785 liters
-----------------
1 gallon
Doing so results in:
3.785 liters 10.5 gallons
----------------- * --------------------- = 39.74 liters
1 gallon 1