The barge will have to displace the same weight of water as the truck weighs. You can calculate the volume of the water and use the fact that you know its density is 1000 kg/m^3 to find the mass of the water displaced which is equal to the mass of the truck.
On Jan 26, 2009, at 6:25 PM, Chrissy wrote:

 > Hey Mr. Peterson,
> It's Chrissy & I was hoping you could post a Skitch on the Loading a > Truck on a Barge Problem b/c I am a little stuck.
> A rectangular shape ferry boat is 4.07 m wide and 5.97 m long. When > a large loaded truck pulls onto it, it sinks 4.45 cm deeper into the > water. What is the weight of the truck?
> Thanks,
> Chrissy