In a floral design made from tiles each of dimensions 40 cm by 60 cm (See Fig. 8.7), find the ratios of:
(a) the perimeter of shaded portion to the perimeter of the whole design.
(b) the area of the shaded portion to the area of the unshaded portion.

(a) 5 : 9 (b) 3 : 10
Count tiles along length and breadth; convert to total lengths using 40×60. Perimeter and area are proportional to tile counts. Calculations give ratios 5:9 and 3:10.