# Related Rates using Derivatives Examples

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A series of free Calculus Videos and solutions.

Related Rates #5 - Involving Baseball
Related Rates #6 - Rate at Which the Circumference of a Circle is Changing
In this video, a pebble is dropped into a pond creating circular ripples. Here we know the rate at which the radius of a ripple is changing and use that to find the rate at which the circumference is changing.

Related Rates # 7 - Ladder Sliding Down Wall, Finding Rate of Change of Area Under Ladder. In this example, a ladder is being pulled away from a wall causing the ladder to slide down the wall. We find the rate of change of the area underneath the ladder.

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