Concrete is sold by the cubic yard. What is the mass, in kilograms, of one cubic yard of concrete that is five times as dense as water? (1 m = 1.094 yd, and 1 m³ of water has a mass of 1,000 kg.) A) 764 kg B) 3819 kg C) 8733 kg D) 6546 kg E) 2420 kg

Question

Quizplus · Accepted Answer

The density of water is 1,000 kg/m³. Since concrete is five times as dense, its density is 5,000 kg/m³. One cubic yard is equivalent to (1/1.094)³ cubic meters, or approximately 0.764 m³. Multiplying the volume by the density gives the mass: 0.764 m³ * 5,000 kg/m³ = 3,819 kg.

Concrete Is Sold by the Cubic Yard