Q3
A closed box is cuboid in shape with length $$40\text{ cm}$$, breadth $$30\text{ cm}$$ and height $$50\text{ cm}.$$ It is made of a thin metal sheet. Find the cost of metal sheet required to make $$20$$ such boxes, if $$ 1 \text{m}^{2}$$ of metal sheet costs $$\text{Rs. } 45$$