Higher November 2018 Paper 5 Q17
17 The diagram consists of three mathematically similar shapes.
The heights of the shapes are in the ratio 1 : 4 : 5.
Not to scale
Find the ratio
total shaded area : total unshaded area.
Give your answer in its simplest form. [4]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 3 : 2 nfww | 4 | B3 for 15 [shaded] and 10 [unshaded] or M2 for \(5^2 - 4^2\) oe or \(4^2 - 1^{[2]}\) oe or M1 for \(4^2\) or \(5^2\) oe seen | |