Problem when a 20-v emf is placed across two resistors in, Ask an Expert

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Problem: When a 20-V emf is placed across two resistors in series, a current of 2.0 A is present in each of the resistors. When the same emf is placed cross the same two resistors in parallel, the current through the emf is 10 A.

Part A: What is the magnitude of the greater of the two resistances?

I need help to find the magnitude of the greater of the two resistances.

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