Hameed has built a cubical water tank with lid for his house, with each outer edge 1.5 m long. He gets the outer surface of the tank excluding the base, covered with square tiles of side 25 cm (see Fig. 13.5). Find how much he would spend for the tiles, if the cost of the tiles is Rs 360 per dozen

Explanation

Name of tiles required =(surface area for liter to cover)/(Area of each tile)
We put tiles on 5 faces one face is of form squre
Area of `1 face =(side)^3`
Area of `5 faces`
`5xx` Area of `1 face`
`5xx side^2`
`5xx(1.5m)^2`
`5xx(1.5xx100cm)^2`
`5xx150^2cm^2`