A grocer purchased 20 kg of rice at the rate of 15 per kg and 30 kg of rice at the rate of 13 per kg. At what price per kg should he sell the mixture to earn 331/3% profit on the cost price?
Choose the correct choice from the following answers.
A) 28.0 B) 20.0 C) 18.4 D) 17.4 E) None of these
18.4P= 20 ×15 + 30 ×13 = 690   \ sp = 4⁄3 of 690 × 1⁄50 = 18.40   Answer 18.4
<result>C</result>
A grocer purchased 20 kg of rice at the rate of 15 per kg and 30 kg of rice at the rate of 13 per kg. At what price per kg should he sell the mixture to earn 331/3% profit on the cost price?