Answer:
Here's a rough diagram for this question!
The scale I used is 1cm = 5000N.
So, 20000N = 4 cm & 30000N = 6cm.
To find the magnitude of the resultant force, draw a straight line from one corner of the parallelogram to the other end and measure the line. From the diagram, mine would be around 10cm. So, based on the scale I used, 10cm would be 50000N. Therefore, the resultant force is 50000N!
For the angle between the resultant force, I got around 13°-14°!
I hope this helps!
EDIT: My bad, I just noticed I wrote 2000N on my pic loll, thats supposed to be 20000N.