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At the instant shown, A has a speed of 60ft/sand is increasing its speed at the rate of 15 ft/s2 until it travels for a distance of 100π ft, after which it maintains a constant speed. Car B has a speed of 120ft/s and is decreasing its speed at 15 ft/s2 until it travels a distance of 65π ft, after which it maintains a constant speed. Determine the time when they come side by side.
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