Mathematics 4024 · O Level · Surface area and volume
Surface area and volume — practice question
A paving slab is a cuboid whose length is $40\text{ cm}$, width is $20\text{ cm}$ and depth is $h\text{ cm}$. The volume of the slab is $2400\text{ cm}^3$.
(a)[1]
Find $h$.
(b)[1]
Calculate the amount of concrete needed to produce $1000$ of these slabs. Give your answer in $\text{m}^3$.
(c)[2]
A mathematically similar slab has length $60\text{ cm}$. Calculate the volume of concrete, in $\text{cm}^3$, required to make one of these larger slabs.
Worked solution & mark scheme
This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Final answer: 3” …