Static equilibrium problem - can't find right answer

[krypt0nite]

How do I do this problem? How do I start?
Problem
I drew all the Forces acting on the body and used Net Torque=0. I still can't find the right answer. So far none of my answers are close. I think my approach is wrong. Can someone give me any hints to help me solve it.

 

[Gokul43201]

What you've done is essentially correct, but unless you show your calculations, there's no way we can tell you where you made the mistake.

 

[krypt0nite]

Net Torque CCW = Net Torque CW
Mg(3m) = 470.4N(6m) I used the wheel as the fulcrum point.
Mg= 940.8N

 

[Gokul43201]

You do not know that the center of mass of the boat is at 3m.

You must assume the position of the CoM as some distance x (from the wheel) in the first case, and x - 0.15 in the second case. Write both equations, with the two unknowns (x and M), and solve for them from the equations.

 

[krypt0nite]

and the answer is A=440kg right?
thx

 

[F|234K]

H.C, how u get the question from the test#?$#?@$?#@