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UKMT Senior Mathematical Challenge, 2009

Algebra Difficulty 1.0 Junior Find the answer United Kingdom

Steve travelled 150 miles on a motorbike and used 10 litres of petrol. Given that 1 gallon $\approx 4.5$ litres, roughly how many miles per gallon did Steve achieve on his journey?

(A) $10$ (B) $20$ (C) $40$ (D) $50$ (E) $70$

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