Train P passes a station heading east at 40 km/h at 10:00 a.m

MATHEMATICS · Subjective · AP · Calculus AB · Contextual Applications of Differentiation · Contextual Applications of Differentiation

Problem

Train P passes a station heading east at 40 km/h at 10:00 a.m. At 10:10 a.m., Train Q is 30 km due north of the station and begins traveling due south at 50 km/h. Determine the rate of change of the distance between the two trains at 10:30 a.m. Give your answer in km/h.

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