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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.
Solution
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
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[Are these equivalent ratios?]
