A container has only two types (P and Q) of oil in the ratio 7:3 respectively. When 80 litre of oil Q is added to the container the quantity of oil P becomes 25% of that of oil Q. Find the capacity of the container if it becomes full after addition of 80 litre of oil.
Let the quantity of oil in the container be 7x and 3x litres respectively. According to the question, => 7x = 0.25 × (3x + 80) => 6.25x = 20 => x = 3.2 Total capacity of the container = 7x + 3x + 80 = 112 litres.
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