Foundation January 2023 Paper 1R Q16
16 The diagram shows a solid triangular prism.
Diagram NOT accurately drawn
Work out the total surface area of the triangular prism.
Give your answer correct to 3 significant figures.
(3)
| Scheme | Marks |
|---|---|
| M1 | |
| 0.5 × 4.8 × 3.6 (= 8.64) oe or 4.8 × 3.6 if clear intention for this to be 2 triangles 7 × 3.6 ( = 25.2) 7 × 4.8 (= 33.6) 7 × 6 (= 42) (all measurements with intention to add) | M1 |
| Correct answer scores full marks (unless from obvious incorrect working) Answer: 118 | A1 |
| (3) | |
| (3 marks) |
Notes
M1: For area of 2 different faces (ie not 2 triangles)
M1: For adding together 5 areas , at least 4 of which are correct
NB: (3.6 + 4.8 + 6) × 7 (= 100.8) is 3 faces
A1: 118.1 or 118.08