The function is determined using speed and is found to be d = 120t.
What is speed?
Speed is generally the change in distance per unit time. (rate of change of distance)
What is the formula of speed?
To calculate speed, we will use speed = distance/time.
speed = 360/3
= 120km/hr
Since, the train is moving with a constant speed the ratio of distance and time will be equal to 120 throughout the journey.
120 = d/t
Hence, d = 120t.
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