1)

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 ?

A) 2010

B) 2011

C) 2012

D) 2013

**Answer:**

Option B**Explanation:**

Suppose commodity X will cost 40 paise more than Y after z years .Then,

(4.20+0.40z)-(6.20+0.15z) = 0.40

=> 0.25z = 0.4+2.10 => z = 250/0.25 = 250/25 = 10

X will cost 40 paise more than Y ,10 years after 2001 ie in **2011.**