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2(hb+bl+lh)
Your answer :-
2( 16×12 + 16×9 + 12×9 )cm^2
2(192 + 144 + 108)cm^2
2 (444) cm^2
888 cm^2
Surface Area of a Cuboid = 2(lb + bh + hl)
= 2[(16 × 12) + (12 × 9) + (9 × 16)] cm²
= 2(192 + 108 + 144) cm²
= 2 × 444 cm²
=888 cm²
Hope it helps...