roof Size and Weight: 80 in x 40 in x 2 in; 50 lbs.
solar panels size 80 inches by 40 inches
covert them so that they both use the same units
To compare the size and weight of the roof and solar panels, you need to ensure that they are both using the same units of measurement.
Given:
Roof: Size - 80 in x 40 in x 2 in; Weight - 50 lbs.
Solar Panels: Size - 80 inches x 40 inches
To convert the roof dimensions to the same units as the solar panels, which are in inches, you can simply keep the measurements as they are.
Therefore, the converted roof size is also 80 inches x 40 inches x 2 inches.
Now, both the roof and the solar panels have the same size units.
However, the weight of the roof is still stated in pounds (lbs), while we don't have any weight information for the solar panels. If you want to compare the weight, you need to convert the weight of the roof to the same unit as the weight of the solar panels.
To convert pounds (lbs) to inches, you would need to know the specific density of the material the roof is made of, as weight is a measure of mass and not directly convertible to inches.
Therefore, without additional information, it is not possible to directly compare the weight of the roof and the solar panels.