Question

A cubical box with a lid has a length of 30 m. find the cost of painting the inside and outside of the box at rs. 2per metre square

Answer 1

Area of the cubical box is: 6a²=6×(30)²=6×900=5400 m².
If it costs Rs. 2 /m² for painting then the total cost will be:
5400×2=Rs. 10800 Ans.