Question

Plzzzz give me this answer. ​

Answer 1

Answer:

Explanation:

If two resistors are in parallel effective=R/2

Now r/2 and R are in series

So effective=R+R/2=3R/2

Given 3R/2=15

3R=30

R=10

Now three are in parallel

So effective=1/R=1/10+1/10+1/10

R=10/3

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