Question

In a floral design made from tiles dimensions 40 cm by 60 cm (See figure), find the ratios of the area of the shaded portion to the area of the unshaded portion.

Answer 1

Perimeter of shaded portion = 10 units

Perimeter of whole design = 18 units

Area of shaded portion = 6 sq.units

Area of whole design = 20 sq.units

Ratio of area shaded portion to the area of unshaded portion = `6/(20 - 6)`

= `6/14`

= `3/7`

= 3 : 7