A watch is sold at a profit of 25%. Had it been sold for Rs. 120 less than, there would have been a less then of 15%. What is the cost price in rupees ?

Rs 400  Rs. 350 Rs. 200 Rs. 300

Rs. 300

Let the cost price = 100x According to the question, 100x × 125% - 120 = 100x × 85% = 125x - 120 = 85x = 40x = 120 = x = 3 So, cost price = 100 × 3 = Rs. 300 = Rs. 300