a fruit seller sells mangoes at the rate of rs . 12 per kg and thereby loses 10 % . at what price per kg , he should have sold them to make a profit of 15 % ?
"solution 90 : 12 = 115 : x x = ( 12 ã — 115 / 90 ) = rs . 15.33 hence , s . p per kg = rs . 15.33 answer c"
divide(multiply(12, add(const_100, 15)), subtract(const_100, 10))