The price of commodity X increases by 40 paise every year while the price of commodity Y increases b...........

Quantitative Aptitude ( CCS) Ratio, Proportion

The price of commodity X increases by 40 paise every year, while the price of commodity Y increases by 15 paise every year. I fin 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 tha

2010

2011

2012

2013

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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= 2.50/0.25 = 10
Therefore, X will cost 40 paise more than Y 10 years after 2001 . i.e in 2011