4MA0 Foundation January 2016 Paper 2 Q19
19 The lengths of the sides of a triangle are in the ratios 2 : 6 : 7
The length of the longest side of the triangle is 24.5 cm.
Work out the perimeter of the triangle.
(3)
| Scheme | Marks |
|---|---|
| \(\dfrac{24.5}{7} \times 2\) (=7) or \(\dfrac{24.5}{7} \times 6\) (=21) or \(\dfrac{24.5}{7} \times 8\) (=28) | M1 |
| \(\dfrac{24.5}{7} \times 2 + \dfrac{24.5}{7} \times 6 + 24.5\) (=7 + 21 + 24.5) | M1 |
| 52.5 | A1 |
| (3) |
Notes
M1: fully correct method
[M2 for \(\dfrac{24.5}{7} \times (7 + 6 + 2)\)]