Answer:
surface area of block pink
[tex]2(lb + bh + hl) \\ 2(12 + 4 + 12) \\ 2(28) = 56 {cm}^{2} [/tex]
surface area of green block
[tex]2(lb + bh + hl) \\ 2(50 + 20 + 40) \\ 2(110) = 220 {cm}^{2} [/tex]
total surface area:surface area of block pink+surface area of green block - area of side base
i e
[tex]276 {cm}^{2}
[/tex]-[tex]4{cm}^{2}
=[tex]272{cm}^{2} [/tex]
Hope it helps you<3
