Answer:
100 minutes (or 1 hour and 40 minutes)
Explanation:
to start I subtracted 4,500( how much it can hold) by 1,500 (how much it has already) to get 3,000.
4500 - 1500 = 3000 (300 + 1500 = 4500)
so the pool would need 3,000 more gallons of water to reach the limit,
then divide 3,000 by 30 to know how many 30 gallows would be needed to reach the limit
3,000 ÷ 30 = 100 (100 x 30 = 3,00 so this is correct)
He would need to add water for 100m to avoid exceeding the limit.
That is as far as I know, you can utilize this problem to write an appropriate Inequality, I hope this is helpful!