How many liters of oil at Rs. 40 per liter should be mixed with 240 liters of th

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How many liters of oil at Rs. 40 per liter should be mixed with 240 liters of the second variety of oil at Rs.60 per liter so as to get a maximum whose cost is Rs.52 per liter?

Options:

A . 160 liters

B . 140 liters

C . 150 liters

D . 170 liters

Answer: Option A

Apply the Allegation Method and first calculate the ratio in which they have to be mixed.
= 8 : 12 = 2 : 3 Thus, the two varieties of oil should be mixed in the ratio 2 : 3. So, if 240 liters of the second variety are taken, then 160 liters of the first variety should be taken.

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