# Question #72fd4

##### 1 Answer

May 31, 2015

The answer is 248.

We have an arithmetic sequence :

where

(n = 1 = ground floor).

The sum of the windows for

If

May 31, 2015

The answer is 248.

We have an arithmetic sequence :

where

(n = 1 = ground floor).

The sum of the windows for

If