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Question:

Mrs kaushik has a square plot with the measurement as shown in the figure. She wants to construct a house in the middle of the plot. A garden is developed around the house. Find the total cost of developing a garden around the house at the rate of Rs 55 per sq. metre.

Solution:

Area of the square plot=(25×25) m²
Area of the house=(15×20) m²
Area of remaining portion in which the garden is built=Area of square plot−Area of the house=(25×25)−(15×20)=625−300=325 m²
Total cost=Rs(325×55)=Rs17,875