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 Y ?	Choose the correct choice from the following answers:	A) 2010	B) 2011	C) 2012	D) 2013	E) 2014
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   z= 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 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 Y ?