The rectangular floor of a storage building had a length of 25 yards and a perimeter of 90 yards. A construction crew knocked out one wall and extended the length of the floor by 10 yards.
All you have to do is this, area = Base * height or B*H so now you all you do is, 90*25 = 2250 then since 10 more yd is put on all you do is 2250 = 1400 yd.