(a) The density of the concrete is 2400 kg/m\(^3\)
Work out the mass of the concrete. [2 marks]
(b) The 3.8 m\(^3\) of concrete is made into the shape of a cylinder.
The base has radius 0.5 metres.
Work out the height of the cylinder. [2 marks]
Mark scheme (a)
Answer
Mark
Comments
\(2400 \times 3.8\) or \(\dfrac{m}{3.8} = 2400\) or \(\dfrac{m}{2400} = 3.8\)
M1
oe equation allow mass for \(m\) allow any letter apart from \(v\) or \(d\)
9120
A1
Mark scheme (b)
Answer
Mark
Comments
\(\pi r^2 h = 3.8\) or \(\pi \times 0.5^2 \times h\) or \(0.25\pi h\) or [0.78, 0.79]\(h\) or \(3.8 \div (\pi \times 0.5^2)\) or \(3.8 \div 0.25\pi\) or \(3.8 \div\) [0.78, 0.79]
