A box is in the form of a cuboid whose external measures are 40 cm × 15 cm × 20 cm. The base, side faces and back face are to be covered with a colored paper. Find the area of the paper needed?
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CSA Of Cuboid= 2(l+b) h+l×b
= 2(40+15) 20 + 40 ×15
= 2×65×20 + 600
= 2600+ 600
3200c^2
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