Answer:
20 times bigger.
Explanation:
A quart is a liquid unit of measurement that is equal to a quarter of a gallon. Given that, 2-quarts is equal to half of a gallon (0.5-gallon). Now, you just need to divide the volume of the new tank by the volume of the old one.
10-gallons/0.5-gallons = 20
The new tank is 20 times bigger than the old bowl.