Use the table about the speed of a train over a 3-hour period. The time count does not begin from starting of train.
How fast was the train travelling 2 1/2 hours after the beginning of the time period?
$$2\ \frac{\ 1}{2}\ $$ hours after the beginning of the time period means 120 +$$\left(2\ \cdot60\right)+\left(\frac{\ 1}{2}\cdot60\right)=\ 120+30=150\ \ \ $$ minutes.
From the table, we can infer that after 150 minutes, Speed of the train was 65 km/hour
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