Related+Rates+Quiz+for+Clay

Clay's Related Rates Quiz

3) Let V be the volume of a sphere with radius r at time t. If the **radius** changes at a rate of 3 ft/min, at what rate is the sphere's **volume** changing when r = 2?

Need a formula? Click @Formulas for Related Rates Calc Quiz.


 * 3) || [[image:http://cow.temple.edu/~cow/images/auxiliary/StreetlightImages/Man%20and%20streetlight.lightbaby.gif]] || A 2 ft tall infant is crawling away from a 20 ft high streetlight at the rate of 1.2 ft per second. How fast is the infant's shadow growing as she crawls? ||

1) A 20 ft long ladder is leaning against a wall, but is sliding down. At the moment when the base of the ladder is 12 ft from the wall and is sliding away at 5 fps, how high is the top of the ladder and how fast is it sliding down?