<u>Answer</u>:
1296 windows are present in the building
<u>Explanation:</u>
Given the office building is 48 floors high
Half of floors have 18 windows each
Then , half of floors = = 24 floors
Total windows on half of the floors, that is 24 floors
=
= 432 windows
Also, half of the floors have 36 windows each
Total windows on rest half floors (24 floors)
=
= 864 windows
Total windows = 432 + 864 = 1296 windows
Therefore, 1296 windows are present in the building