Answer:
1. 31.25 square m, 2. S=478 square m, 3. 6.25 square m
Step-by-step explanation:
------------------- Surface Area of the Rectangular Prism(2ND ANSWER)
S=2(lw)+2(lh)+2(wh)
S=2(11*9)+2(7*11)+2(7*9)
S=2(99)+2(77)+2(63)
S=198+154+126
S=478 square m
--------------------- Surface area of Cube(1ST ANSWER)
S=6(lw) -2.5^2
S=6(6.25)-6.25(overlapping area A)
S=5(6.25)
S=31.25 square m
-------------------------------------------------- Overlapping area A(3RD ANSWER)
-> 6.25 square m
--------------------------------------------------- Surface area of composite figure(4th ANSWER)
=478+37.5-2(2.5)
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