a man bought 40 shares of rs . 60 at 6 discount , the rate of dividend being 12 1 / 2 % the rate of interest obtained is
"explanation : face value of a share = rs . 60 he bought each share at rs . 60 - rs . 6 = rs . 54 number of shares = 40 dividend = 12 1 / 2 % = 25 / 2 % dividend per share = 60 × 25 / 2 × 100 = rs . 7.5 total dividend = ( 40 × 7.5 ) ie , he got a dividend of ( 40 × 7.5 ) for an investment of rs . ( 40 × 54 ) interest obtained = 40 × 7.5 × 100 / 40 × 54 = 13.89 % answer : option a"
divide(multiply(multiply(40, 60), divide(12, const_100)), multiply(40, subtract(60, 6)))