A watch was sold at a loss of 10%. If it was sold for Rs.225 more, there would have been a gain of 5%. What is the cost price? Select the correct option:
A) 1000
B) 1500
C) 2778
D) 2788
E) 2991

Rationale: "90 % 105 % - - - - - - - - 15 % - - - - 225 100 % - - - - ? = > rs . 1500 answer : b"
Answer: B