Let's set up equations to represent the depths of both tanks over time:
For tank A: Depth = 1 + 4h (where h is the number of hours).
For tank B: Depth = 4 + 2h (where h is the number of hours).
To find the time when the water in tank A is deeper than in tank B, we need to compare their depths:
1 + 4h > 4 + 2h
Now, solve for h:
2h > 3
h > 3/2
The water in tank A will be deeper than the water in tank B after 3/2 hours, which is equivalent to 1.5 hours.