An open box is made of wood, which is 2 cm thick. Its internal length is 56 cm, breadth is 46 cm and height is 38 cm. Find the cost of painting the outer surface of the box at `10 per cm2 .
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volume of outer surface =
length=56+4=60
breadth=46+4=50
height=38+2=40
outer surface =latetal surface +area of base
2h (l+b)+l×b
2×40×110+3000
8800+3000
=11800
cost of paintings =10×11800=$118000
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