How many liters of oil at Rs.40 per liter should be mixed with 240 liters of a second variety of oil at Rs.60 per liter so as to get a mixture whose cost is Rs.52 per liter?  Pick one:
A) 120
B) 150
C) 160
D) 180
E) 200
8:12 = 2:3   If 240 lrs of the 2nd variety taken then the 1st variety should be taken as 160 lr   ANSWER 160
<result>C</result>
How many liters of oil at Rs.40 per liter should be mixed with 240 liters of a second variety of oil at Rs.60 per liter so as to get a mixture whose cost is Rs.52 per liter?