Peter Reilley wrote:

When you throw the block and rope into the water, you have, in
effect, changed the shape of the hull, without changing its weight, so the
amount of water displaced does not change. Therefor, the pond level does
not change. Making the rope "weightless" or of neutral buoyancy does not
make any difference. The water level does not change.



I believe that we have a correct answer.


What's interesting is the boat would ride higher in the water but the
level in the tank would remain the same.




--

Mark

N.E. Ohio


Never argue with a fool, a bystander can't tell you apart. (S. Clemens,
A.K.A. Mark Twain)

When in doubt hit the throttle. It may not help but it sure ends the
suspense. (Gaz, r.moto)