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Please Solve RD Sharma Class 12 Chapter 17 Maxima and Minima Exercise Case Study Based Questions question 5 subquestion (i)  Maths Textbook Solution.

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Answer:  \text { 1800xy }

Hint: use concept.


X is length, y is breadth

Area = l × b

\mathrm{A}=\mathrm{xy}, For one square meter the cost is 1800

So, A=1800 x y


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