Let me talk about it. ..

This question is not difficult. To discuss the maximum gravity, we should actually discuss which rope reaches the maximum tension t first, because at this time it will reach a critical state, and the rope will break when the object is heavy, and then we will see.

There are Toa*cos30=Tob*cos60 in the horizontal direction.

Obviously cos30 is larger, so Tob reaches the maximum, that is, 1000N, and then Toa can be calculated, so that the maximum value of G can be calculated. The key is to see who comes first in the critical state. Got it.