A man sells an article at 10% gain. Had be sold at for Rs.60/- more he could have gained 20% what is cost price of article	Choose the correct answer:
A) rs . 500
B) rs . 600
C) rs . 650
D) rs . 760
E) rs . 800

Rationale: first selling price = 110 % - - - - - > x rupees = sold at for rs . 60 / - = 120 % - - - - - > x + 60 rupees ~ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10 % - - - - - - - - > 60 100 % - - - - - - - > rs . 600 / - option ' b '
Answer: B