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Use the table about the speed of a train over a 3-hour period. The time count does not begin from starting of train.
Time (Minutes) 0 30 45 60 90 120 150 180 Speed at given time in (km/hr) 40 45 47.5 50 55 60 65 70 [1] During the three-hour period shown in the table, the speed of the train increased by
(a) 25%
(b) 100%
(c) 75%
(d) 125%[2] At time t, measured in minutes after the beginning of the time period, which of the following gives the speed of the train in accordance with the table?
(a) t/6
(b) 6t
(c) 40 + t
(d) 40 + t/6[3] How fast was the train travelling 5/2 hours after the beginning of the time period?
(a) 50 km/hr
(b) 55 km/hr
(c) 60 km/hr
(d) 65 km/hrasked in SNAP
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