Answer: 17,328 square ft
Solution:
area of each floor= length * breath
= 38*76
= 2888 square ft
one two-storey apartment will have 2 floors,
so, floor area of one two-storey apartment= 2* 2888
= 5776 square ft
then floor area of 3 two-storey apartment houses is= 3* 5776
= 17,328 square ft