Last Friday I travelled on the 9.00 am train from Ayton to Seaview. The train averaged 40 mph over the whole journey, but was much slower on the climbs through the rolling hills between the two towns.
I returned the day after on the 9.00 am train, a new express and the average speed for the return journey was 60 mph, and we had a long stop in Beeborough! Beeborough is exactly halfway between Ayton and Seaview.
Given the information above, can you say with complete certainty any of the following are true:
- The average speed for the round-trip journey was 50 mph,
- On the return journey the average speed from Seaview to Beeborough was more than 30 mph,
- On Friday I arrived in Beeborough later in the day than I did on my return journey,
- At some time on Saturday I passed through the same point at exactly the same time as I passed through that point the previous day.
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Answer at 9.00 on Monday