Answer:
145
Step-by-step explanation:
Find the perimeter of the base
5*4=20
Find the surface area of the base
5*5=25
T.S.A.=[tex]\frac{1}{2}[/tex](20)(6)+25 = 145
surface area of a square pyramid
= Area of base + 1/2 base perimeter * slant height
= (5 x 5) + (1/2 x (5x4) x 6)
= 25 + 60
= 85 ft²
