Ratio and Proportion - Quantitative Aptitude (MCQ) questions for Q. 746

Q.  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?
- Published on 06 Jul 15

a. 9:19
b. 19:9
c. 15:28
d. 28:15

ANSWER: 19:9
 
Let A1 be the area of flat and A2 be that of the commercial space
Total cost = area * rate
Therefore, cost of flat = A1*4500 ; cost of commercial space = A2*9500
Both the above costs are same
A1*4500 = A2*9500
A1:A2 = 9500:4500 = 19:9

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