Answers

2014-12-12T12:46:15+05:30
We can take chalk box as cube. surface area of cube{curved surface area of cube=2h(l+b).so length=16cm
                     breath=8cm
                      height=6 cm .2*6*16+8 =12*24=288cm APOORVA
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Chalk box is not a cube. Please check the approach is wrong.
sorry its cuboid