Answer:
Step-by-step explanation:
Rectangular prism:
l =9 ft ; w = 8 ft ; h = 5ft
Area1 = Surface area of rectangular prism without top = lw + 2wh + 2lh
= 9*8 + 2*8*5 + 2*9*5
= 72 + 80 + 90
= 242 sq.ft
Cube:
a = 5 ft
Area2 = Surface area of cube without top = 5a²
= 5 *5²
= 125 sq. ft
Area3 Surface area of the top = l*w - a²
= 9*8 - 5²
= 72 - 25
= 47 sq.ft
Surface area of the figure after removing cube = area1 +area2 + area3
= 242 + 125 + 47
= 414 sq.ft
