Question

A student is required to cover an area of 620cm^2 with mosaic tiles. The tile pattern is to be surrounded by border of 2 cm wide to complete the display page. The length of the display page is 'l'cm and its width is 4 cm less than its length.
(A) find the width of the display page in terms of 'l'
(B) find the width and length of the tile pattern in terms of 'l'
(C) using the answers from (B), write an equation relating the area of the tile pattern to its dimensions