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A car and a truck leave an intersection at the same time the car travels east at 120km per hour and the truck travels north at 50km per hour how fast the distance between then changing after 45 minute?
Wiki User
∙ 13y ago
Write a formula to calculate the distance between the two, as a function of time. Use the Law of Pythagoras.
Then take the derivative of this distance, and evaluate at the particular time t = 0.75 (hours).
Wiki User
∙ 13y ago
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