Intermediate November 2022 Unit 1 Q19
19. In the following formulae, each measurement of length is represented by a letter.
Consider the dimensions implied by each formula.
For each case, write down whether the formula could be for a length, an area, a volume or none of these.
The first one has been done for you. [3]
| Formula | Formula could be for |
|---|---|
| \(7a^3 - abc\) | volume |
| \(7ab - 5b^2 + \dfrac{a^2b}{c}\) | …………………… |
| \(5abc - 6bc + b^2\) | …………………… |
| \(4a^2b + 4b^2a\) | …………………… |
| \(3a + 8b + 2c\) | …………………… |
| \(a^2 - abc\) | …………………… |
| Scheme | Marks | Comments |
|---|---|---|
| (Volume) Area None Volume Length None | B3 | Must use the terminology given in the question. B3 for all 5 correct. B2 for 3 or 4 correct. B1 for 2 correct. B0 otherwise. |