A helicopter is rising vertically from the ground at a constant rate of 4.5 meters per second. When it is 75 m off the ground, a car passed beneath the helicopter traveling in a straight line at a constant rate of 80 kph. Determine how fast the distance between them changing after 1 second. a) 07.33 m/s b) 08.13 m/s c) 09.67 m/s d) 10.32 m/s
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