That is great thank you.
So transforming Δ circuit to Y circuit as in the diagram,
Transforming the Δ component on the right side of the circuit to Y-component yields,
I tried this as well,
considering the contour that includes i1 and i4
$$ 20 i_1 + 10 i_4=V_0 $$
considering the contour that includes i2 and i5
$$ 10 i_2 + 20 i_5=V_0$$
multiplying the second equation by 2 and collect term $$(i_1 + i_2)$$.
$$ 20(i_1 + i_2) + 10 i_4 +i_5=3V_0 $$
divide on $$...
How to calculate the value of total resistance RT in the shown circuit?
The Attempt at a Solution
I used Kirchhoff` first law: i1+i2=I where i1, i2 and I are the current passing through R1, R2 and the total current in the circuit, respectively...