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Base area of the blue rectangle = 11 x 5 = 55 cm^2
Surface of the both front and back side of blue rectangle = (11 x 5 x 2) = 110 cm^2
Total surface of the x cross section side of the blue rectangle = (5 x 5 x 2)= 50 cm^2
Surface are of the top of blue rectangle = 55 - ( 2 x 2) = 51 cm^2
Surface of the both front and back side of the top greenish figure = (2 x 4 x 2) = 16 cm^2
surface of the x cross section sides of the top figure = (2 x 4 x 2) = 16 cm^2
Surface of the top side of the top figure =( 2 x 2) = 4 cm^2
So the total surface area of the above figure is given by (55 +110 + 50 + 51 + 16 + 16 + 4) cm^2, which is 302 cm^2.
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