we know that
the length sides of Aquarium are
(83-32) x (72-52)-----> 51 ft x 20 ft
Area reptile room=(83*72)-area of aquarium----> 83*72-51*20---> 4956 ft²
[ total area of both rooms]=2*4956-----> 9912 ft²
I'm assuming that the two areas are equal
the answer is
9912 ft²
