Question

I need help with this question please. The answer choices are:

48 ft squared
84 ft squared
96 ft squared
156 ft squared

Answer 1

the answer is 84

`{3}^(2) + {x}^(2) = {5}^(2)`

25-9= 16 so x=4

4×(3×4)+6×6 = 48+36 = 84