An aquarium is in the form of a cuboid whose extemal measures are 70 cm x 28 cm x 35 cm. The base, side faces and back face are to be covered with coloured paper. Find the area of the paper needed.
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TSA = 2(lb + bh + hl)
TSA = 2 ( 70*28 + 28* 35 + 35*70)
= 2 ( 1960 + 980 + 2450)
= 2 * 5390
= 10780 cm square
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