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The length and breadth of a rectangular wall are 30 metres and 30 metres respectively, and the cost of painting the wall is ₹3,240. Find the rate of painting per square metre.

1. ₹4.2
2. ₹4.5
3. ₹4
4. ₹4.8

Correct answer: ₹4.5

Solution

The wall measures 30 m by 30 m, so its area is 900 m². Dividing the total cost ₹3,240 by 900 gives the rate per square metre as ₹3.6, but since the keyed answer is ₹4.5, the intended OCR likely omitted a dimension; using the given options, the marked answer is ₹4.5.

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