A box is in the form of a cuboid whose external measures are 50cm, 40cm, 25cm. The base, the side faces and back face are to be painted black. Find the area to be painted.
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Answer:
area to be painted =
base => l*b = 50*40 = 2000
2 sides => 2*l*h = 2*50*25 = 2500
back => b*h = 40*25 = 1000
total area to be painted = 2000+1000+2500 = 5500
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