Answers

2016-02-06T17:51:15+05:30
T.S.A of the box
= L.S.A of cuboid+area of base
=2(1+.8).5+1*.8
=18+.8
=18.8m
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2016-02-06T17:52:20+05:30
The surface area of the box=lateral surface area of the box+area of its base
                                              =2(l+b)h+lb
                                             =2*0.5(1+0.8)+1*0.8
                                            =1.8+0.8
                                              =2.6 m^{2}
             Therefore the surface area of the box is 2.6 m^{2}
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