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

• B. 2011
  
  If After x years , commodity X will cost 40 paise more than the commodity Y, then
  
  420 +40x = 630+15x+40
  x= 10
  
  so in 2011 , commodity X will cost 40 paise more than the commodity Y.
• 12 years agoHelpfull: Yes(5) No(1)
• l.c.m of 40,15 is 120..
  6.30+1.20=7.50...
  this is 8 years for Y...
  8 years for X=40*8=320
  4.20+3.20=7.40
  9th year X is 7.80
  Y is 7.65
  10th year
  X is 8.20
  Y is 7.80
  diff is 40ps..
  so at 2001+10 years=2011...
• 9 years agoHelpfull: Yes(0) No(0)