Foundation November 2021 Paper 3 Q10
10 A student has some cubes that are all the same size.
Each cube is 3 cm by 3 cm by 3 cm.
They put 4 of these cubes together to make this shape.
Calculate the surface area of the shape. [4]
| Answer | Marks | Part marks and guidance | |
|---|---|---|---|
| 162 | 4 | B1 for [Area of face =] 9 B1 for [Total number of faces =] 18 M1 for their number of faces \(\times\) their 9 Alternative B1 for [area of face =] 9 B1 for [total surface area of cube =] 54 M1 for their \(54 \times 4 - 6 \times\) their 9 oe Alternative B1 for [area of face =] 9 M1 for \(24 \times\) their 9 soi 216 M1 for their \(216 - 6 \times\) their 9 | e.g. \(4+4+3+3+2+2\) or \(5+4+4+5\) May be in stages e.g. \(5 \times 9 + 4 \times 9 +\) etc Accept other alternative methods |