Answer:
13 hours, 33 minutes, 20 seconds
Explanation:
The swimming pool will hold 1.22 million cubic inches of water, and if it fills up at 1500 cubic inches per minute, it will take 813 minutes and 20 seconds to fill the pool, which means that in simplest form, that will be 13 hours, 33 minutes, and 20 seconds.
Hopefully the answer and explanation helps!