Question
A single reservoir supplies petrol to the whole city, and the reservoir is fed by a single pipeline filling the reservoir with a stream of uniform volume. When the reservoir is full and if 40,000 litres of petrol is used daily, the supply fails in 65 days. If 45,000 litres of petrol is used daily, it fails in 55 days. How much petrol can be used daily without the supply ever failing?
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