Step 1:

We are asked to represent graphically a displacement of 40km,$30^{\large\circ}$ east of length.

We know displacement is a vector quantity which has both magnitude and direction.

Clearly it is given in the above problem 40km,which represents its magnitude and 30$^{\large\circ}$ east which represents its length.

Step 2:

The above figure represents this clearly.

Vector $\overrightarrow{OP}$ now represents the displacement of 40km,$30^{\large\circ}$ east of length.