Step-by-step explanation:
It is given that, a girl pushes on a table with a 5-newton force directed to the east. Her friend pushes on the same table with a 10- newton force directed south.
We know that force is a vector quantity. So, diagram that depicts the action of two friends is option (d). The magnitude of the resultant force is given by :

R = 11.18 N
Hence, the correct option is (D).