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Verified Answer :

sa= bw+hw+lw+\(\frac{1}{2}bh\)(2)
SA=(124)+(164)+(204)+( \(\frac{1}{2} 12*16*2\))
SA= 28+64+80+(6
162)
SA=28+64+80+(96
2)
SA=28+64+80+192
SA=364\(cm^{2}\)