Hi aspirant,
It is a very simple mathematical questions which can be easily solved using the appropriate formulas. Given values of length, breadth and height 10, 20 and 30 centimetre respectively.
Surface area of cuboid= 2*(l*h+w*h)
=2x(300+600)= 1800 cm^2
Total surface area= 2*(lw+lh+wh)
= 2*(300+600+200)= 2200 cm^2
Hope it helps!
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