Project ForgeGeneral Aptitude
Quantitative Aptitude
GATE 2013
Medium
The current erection cost of a structure is Rs. 13,200. If the labour wages per day increase by 1/5 of the current wages and the working hours decrease by 1/24 of the current period, then the new cost of erection in Rs. is
- A16,500
- 15,180
- C11,000
- D10,120
Explanation
Cost is proportional to wage-rate × hours. New wage rate = (1+1/5) = 6/5 of original; new hours = (1−1/24) = 23/24 of original. New cost = 13,200 × (6/5) × (23/24) = 13,200 × 138/120 = 13,200 × 1.15 = 15,180.
Source: GATE CS 2013 (2013)
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