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ReplyDeleteHey has anybody figured out the problem of the month? It's very hard.

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DeleteDavid has a new cycle computer but has not learned all the functions yet, so can only read the cumulative mileage and average speed of all the journeys since he fitted it. On his first journey using it he covered 15 km at and average speed of 30km/h. He can work out from this that the journey took him 15/30 hours or exactly 30 minutes. After the second journey, his cumulative mileage was 24km and overall average speed 32km/h. What was his average speed on the second journey.

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