The price of commodity X increases by 40 paise every year, while the price of commodity Y increases by 15 paise every year. If in 2001, the price of commodity X was Rs. 4.20 and that of Y was Rs. 6.30, in which year commodity X will cost 40 paise more than the commodity?
Answer & Explanation
Suppose commodity X wil cost 40 paise more than Y after Z years. Then,
(4.20 + 0.40Z) - (6.30 + 0.15Z) = 0.40
0.25Z = 0.40 + 2.10 Z=
X will cost 40 paise more than Y 10 years after 2001 . i.e in 2011
- Quantitative Aptitude - Arithmetic Ability