David mixed 20 kg of butter at Rs. 200 per kg with 30 kg butter at the rate of Rs. 100 per kg. At what price per kg should he sell the mixture to make a profit of 40% in the transaction?
Choose the correct choice from the following options.
A) Rs. 96  B) Rs. 196  C) Rs. 296  D) Rs. 190  E) Rs. 195
Cost of Butter = 20*200+ 30*100 /50 =7000/50= 
<gadget id="calculator">7000/50</gadget>
<output>140</output>
140   40% of 140= 56   S.P. should be = 140+56 = Rs. 196/ kg   Answer : Rs. 196
<result>B</result>
David mixed 20 kg of butter at Rs. 200 per kg with 30 kg butter at the rate of Rs. 100 per kg. At what price per kg should he sell the mixture to make a profit of 40% in the transaction?