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Homework Statement
Find Req in the given circuit
Homework Equations
Series: req = r1+r2...
parallel: 1/req = 1/r1 + 1/r2 ...
The Attempt at a Solution
Without redrawing the circuit I do:
1260 = 10
10+20 = 30
30  30 = 15
15+10 = 25
2525 = 12.5
12.5+15+5 = 32.5 = Req
This is the correct answer.
However if I redrew the T to a delta I no longer can get the right answer.
108  0 = 0
(36  30)  (180  10) = 6
625...
and so on
Where am I going wrong in my logic? Am I not allowed to do this sort of transformation on this problem?
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