Please solve the 6 th question.
Please do not provide any link.
Q.6. Gopal has some Rs. 100 shares of company A, paying 10 % dividend. He sells a certain number of these shares at a discount of 20 % and invests the proceeds in Rs. 100 shares at Rs. 60 of company B paying 20 % dividend. If his income, from the shares sold, increases by Rs. 18,000, find the number of shares sold by