Answer:
[tex]9600 \: {ft}^{2} \\ [/tex]
Step-by-step explanation:
Area of front rectangle -
= 2 ( length × breadth )
= 2 ( 40 × 30 )
= 2 ( 1200)
[tex] = {2400 \: ft}^{2} \\ [/tex]
Area of other rectangles -
= 4 ( length × breadth )
= 4 ( 60 × 30 )
= 4 ( 1800)
[tex] = 7200 \: {ft}^{2} \\ [/tex]
Surface area of the rectangular prism
[tex] = {2400 \: ft}^{2} + {7200 \: ft}^{2} \\ = {9600 \: ft}^{2} \\ [/tex]
