The price of commodity X increases by 40 paise every year, while the price of commodityY 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 Y ?	Pick.
A) 2010
B) 2011
C) 2012
D) 2013
E) None
EXPLANATION   Suppose commodity X will 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= 
<gadget id="calculator">0.40 + 2.10</gadget>
<output>2.5</output>
2.50/ 0.25=250/25= 
<gadget id="calculator">250/25</gadget>
<output>10</output>
10   X will cost 40 paise more than Y 10 years after 2001 i.e., 2011.   Answer 2011
<result>B</result>
The price of commodity X increases by 40 paise every year, while the price of commodityY 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 Y ?