Question Progress The gold bar has a trapezium cross-sectional area Gold has a density of 19.3 grams per cm^3 Work out the mass of the gold bar. Give your answer in kilograms. square Optional working Homework Progress

## Step 1: The mass of an object can be easily calculated if you know its density and volume. The homogeneous nature of the material afterward allows us to ignore the varying surface and calculate the volume using the common formula. The formula to find the mass using density and volume is,### ## Step 2:As stated though, it would be difficult to know the specific cross-sectional shape of the gold bar which has an "optional working" inscription by merely going with the given instructions since no metrics are explicitly mentioned for that trapezoidal cross-section, i.e., we do not have the length, breadth, or height of the trapezoid surface for the gold bar ## Step 3:Since calculation of mass needs density and volume, it would not be possible to come to an applicable calculation without knowing the volume here, i.e., size of that gold bar's trapezoid-surface.