If you're seeing this message, it means we're having trouble loading external resources on our website.

If you're behind a web filter, please make sure that the domains *.kastatic.org and *.kasandbox.org are unblocked.

Main content

Related rates (advanced)

You might need: Calculator

Problem

The circumference of a circle is increasing at a rate of π2 meters per hour.
At a certain instant, the circumference is 12π meters.
What is the rate of change of the area of the circle at that instant (in square meters per hour)?
Choose 1 answer:
Stuck?
Stuck?