Answer:

Step-by-step explanation:
It is given that,
Force due to rope 1,

Force due to rope 2,

Let
is the angle must a third rope tension be applied in order to keep the boat at rest. It can be given by :



The angle clockwise from the positive x-axis will be equal to,


So, the angle must a third rope tension be applied in order to keep the boat at rest is 156.81 degrees. Hence, this is the required solution.