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The ratio of petrol and kerosene in the container is 7 ∶ 8 when 30 litres of the mixture is taken out and is replaced by the kerosene, the ratio become 4 ∶ 5. Then what quantity of petrol is less than the quantity of kerosene in new mixture?

The ratio of petrol and kerosene in the container is 7 ∶ 8 when 30 litres of the mixture is taken out and is replaced by the kerosene, the ratio become 4 ∶ 5. Then what quantity of petrol is less than the quantity of kerosene in new mixture? Correct Answer 70

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