Hi there! I believe the answer is 1080!
Explanation:
First, find out how many bricks were stacked in one hour. The two hour rate was given, so just divide 1440 by 2. That gives you 720. So you have the one hour down. (It's easier to work with one hour.)
Next, you need to find out how many bricks are stacked in the 0.5 period of time. That, you get by just dividing 720 by 2.(because 720 is how many bricks were stacked in one hour) And that gets you 360!
Now, to find the full answer, (1.5 hour brick rate) just add the two numbers.
720+360= 1080
Hope this helps c:
Toodles~