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?	Choose the correct choice from the following options.
A) 120 liters  B) 180 liters  C) 110 liters  D) 160 liters  E) 170 liters
Explanation:   =8:12=2:3   ANSWER IS 160 liters
<result>D</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?