The equivalent resistance of a parallel circuit having resistances 10 ohms, and 20 ohms. I already looked at the answer given. But I dont get where they got the fraction 3/20 ohms in the breakdown. This site should break down every problem as much as possible. Dont assume I know how to get to a step that the site is on.

The equivalent resistance of a parallel circuit having resistances 10 ohms, and 20 ohms. I already looked at the answer given. But I dont get where they got the fraction 3/20 ohms in the breakdown. This site should break down every problem as much as possible. Dont assume I know how to get to a step that the site is on.

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter18: Direct-Current Circuits

Section: Chapter Questions

Problem 18P: (a) Find the current in each resistor of Figure P18.18 by using the rules for resistors in series...

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