How to find the apparent power absorbed by a three phases load?
The current in each phase will be: $$I = \frac{V_{rms}}{Z_{\Delta}} = 150 \angle{45°}~ \text{A}\longrightarrow I_{rms} = 150~\text{A} $$

Apparent power is:
$$ P_{ap} = V_{rms} \cdot I_{rms} = 45~\text{kVA} $$

And the total apparent power is:
$$ P_{total, ap} = 3 \cdot P_{ap}=135~\text{kVA}$$