Calculating reactive power on kVAr?
I don't understand how you've gotten this far without having seen a phase diagram, but here's what it would look like for your problem:







simulate this circuit &ndash; Schematic created using CircuitLab

You have been told what the total apparent power is, and you have been told that the real power is 0.31 times the total. Now you just need to figure out the reactive power, which is the third side of the triangle.