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Two resistors of R Ω and 20 Ω are connected in parallel to get an effective resistance of 15Ω. Find R.

Question

Two resistors of R Ω and 20 Ω are connected in parallel to get an effective resistance of 15Ω.
Find R.

A.

60

B.

30

C.

40

D.

50

Solution

Correct option is A

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