How to choose the receiving end voltage for a transmission line using a short line approximation
I find that the concept of sending/receiving end voltage is somewhat meaningless in most cases.  Actual transmission lines are connected in complex networks with distributed impedance (the line itself) and point impedance (loads tapped off) all over the network.   There is no set beginning or end.  

In the real world you have to keep all points on the line within the stated tolerance of the nominal voltage.  Typically that's +/-10%.  At lower, distribution level voltages where the source impedance is higher, they will often times use voltage regulators or on-load tap changers to maintain the bus voltage dynamically.  

But for your text book question I think that they want the receiving end voltage to be the nominal 220kV and the sending end voltage would be chosen to allow for drop.