Q74 of 131 Page 226

People of Khejadli village take good care of plants, trees and animals. They say that plants and animals can survive without us, but we can not survive without them. Inspired by her elders Amrita marked some land for her pets (camel and ox) and plants. Find the ratio of the areas kept for animals and plants to the living area.

Using the formula: Area of a rectangle = l × b


Total area of land= 15 × 10=150 m2


Area kept for camel = 5 × 3 = 15 m2


Area kept for plants = 9 × 1 = 9 m2


Now, diameter of the circular field kept for ox = 2.8 m


Radius = =1.4 m


Using the formula: Area of a circle = ∏r2


Area kept for ox = × (1.4)2 = 6.16 m2


Area kept for animals = 15 + 9 + 6.16 = 30.16 m2


Living area = Total area of land – Area kept for animals = 150 – 30.16 = 119.84 m2



Ratio of the area kept for animals and plants to that of the living area = 377:1498


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