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You cannot.
First, rectangular is an adjective and there is no associated noun so the question does not specify whether it is about a rectangular pyramid, a rectangular bipyramid, a rectangular prism or some other rectangular figure.
Second, in order to find the weight of an object, you need the volume of the shape, the density of its material and the local force of gravity. The volume of the shape requires length and width as well as the height so the available information is hopelessly inadequate.
What else can I help you with?
How do you calculate density of a rectangular solid?
Density is weight divided by volume. In the case of a rectangular solid, volume is length times width times height.
What is the volume of the rectangular solid above?
To calculate the volume of a rectangular solid, you multiply its length, width, and height together. The formula is: Volume = Length × Width × Height. If you provide the dimensions of the rectangular solid, I can help you calculate the specific volume.
How do you calculate the capacity of a rectangular fuel tank?
It is length * width * height.
How do you calculate the area of a rectangular crystal surface?
It is 2*(Length*Breadth + Breadth*Height + Height*Length).
What formula do you use to find the volume of a rectangular object?
Height x Weight x Height
What formula do you use to find the volume of the rectangular object?
Height x Weight x Height
What formula you use to find the volume of a rectangular object?
Height x Weight x Height
How do you calculate volume of a rectangular prism?
length x width x height
How do you calculate weight of a rectangular solid rubber?
You multiply its density by its volume.
How do you calculate the volume of a rectangular slab?
It is length*width*height - in suitable measurement units.
How do you calculate the volume of a rectangular shaped object like a shoebox?
It is length * breadth * height.
How can you calculate the volume of a rectangular object such as a shoe box?
Volume = Length * Width * Height.
