If a flat costs Rs.4500 per sq. ft, and a commercial space costs Rs.9500 per sq. ft, then what is the ratio of their areas if the total cost of both are the same?
Correct answer: B. 19:9
- A. 9:19
- B. 19:9
- C. 15:28
- D. 28:15
Explanation
With equal total costs, 4500 rupees per square foot × flat area = 9500 rupees per square foot × commercial area. Therefore flat area:commercial area = 9500:4500 = 19:9, because area varies inversely with price per square foot. The likely mistake is option a, 9:19, which uses the price ratio directly instead of taking its inverse.
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