Higher November 2018 Paper 5 Q5
5 The depth of water in a garden pond is 57.8 cm.
The depth decreases by 0.3 cm per day.
(a) Assume the depth continues to decrease at the same rate.
After how many days will the depth reach 54.2 cm? [3]
(b) If the depth of water decreases at a slower rate, what effect will this have on your answer to part (a)? [1]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 12 | 3 | M2 for \(\dfrac{57.8 - 54.2}{0.3}\) oe or M1 for 57.8 – 54.2 or 3.6 seen or for repeated subtraction of 0.3 from 57.8 or for repeated addition of 0.3 to 54.2 | Minimum of 2 repeats (for each repeated method) |
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| Answer would be bigger oe | 1 | e.g. It would take more days It will take longer | |