C4 Connected rates of change - Differentiation - A2 - alevelmathshelp

This 'C4 Connected rates of change' video, as part of the A2, A-level maths, C4 Differentiation syllabus, shows how to connect rates of change in order to answer problems.

For more C4 Differentiation videos please see my ' C4 differentiation playlist' which contains topics from the A2, A-level maths, C4 Differentiation syllabus. Videos included in this playlist: C4 Implicit differentiation: C4 Exponential growth and decay- Differentiation, C4 Connected rates of change -Differentiation and C4 Parametric equations - Differentiation.

If you found this video helpful, please rate this video and tell your friends. Enjoy your maths! Mrs H

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I think there's a mistake on the second example: 200/4(pi)r^2 does not cancel down to 25/(pi)r^2