# Density and measurement

During a heavy rain, a section of a mountainside measuring $$2.5 \text{ km}$$ horizontally, $$0.80 \text{ km}$$ up along the slope, and $$2.0 \text{ m}$$ deep slips into a valley in a mud slide. Assume that the mud ends up uniformly distributed over a surface area of the valley measuring $$0.40 \text{ km} \times 0.40 \text{ km}$$ and that the mud has a density of $$1,900 \text{ kg/m}^{3}.$$ What is the mass of the mud sitting above a $$4.0 \text{ m}^{2}$$ area of the valley floor?

×