Difficulty: Medium
Correct Answer: ₹4,082.40
Explanation:
Introduction / Context:This involves proportional scaling of dimensions followed by area and cost computation. Percentage increases act as multiplicative factors on the original dimensions.
Given Data / Assumptions:
Concept / Approach:Compute new area and multiply by rate to obtain the total cost.
Step-by-Step Solution:
Area(new) = 12.096 * 7.5 = 90.72 m^2 Cost = 90.72 * 45 = ₹4,082.40Verification / Alternative check:Original area = 8.64 * 6 = 51.84 m^2. Scale factors 1.4 and 1.25 multiply area by 1.4 * 1.25 = 1.75, and 51.84 * 1.75 = 90.72 (consistent).
Why Other Options Are Wrong:The other amounts do not align with the precise area scaling and rate multiplication.
Common Pitfalls:Adding percentages instead of multiplying scale factors, or applying the rate to a single dimension instead of the area.
Final Answer:₹4,082.40
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