Calculate the equivalent resistance of the two parallel resistors (R_p).

29. The total resistance of the circuit in Figure 4 is

Step 1: Calculate the equivalent resistance of the two parallel resistors ($R_p$).
The resistors in parallel are $3 \text{ Ω}$ and $6 \text{ Ω}$.

$$\frac{1}{R_p} = \frac{1}{3 \text{ Ω}} + \frac{1}{6 \text{ Ω}}$$ $$\frac{1}{R_p} = \frac{2}{6 \text{ Ω}} + \frac{1}{6 \text{ Ω}}$$ $$$$