answer this question please
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tsa of cuboid = 2(lb + bh + hl)
0.18m= 2(0.30×0.15 + 0.15×h + h×0.30)
0.18 = 2(0.045 + 0.15h + 0.30h)
0.18= 0.09+0.3h+0.6h
0.18= 0.09+0.9h
h = 0.18-0.09 / 0.9 = 0.8m
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