Foundation November 2020 Paper 1 Q15
15 A pyramid has a square base.
Each of the four sloping edges has length 10 cm
The total length of all eight edges is 68 cm
Work out the area of the square base. [4 marks]
| Answer | Mark | Comments |
|---|---|---|
| Alternative method 1 | ||
| \(4 \times 10\) or 40 | M1 | |
| \(68 - 4 \times 10\) or \(68 - 40\) or 28 | M1dep | oe |
| their \(28 \div 4\) or 7 | M1dep | oe |
| 49 | A1 | |
| Alternative method 2 | ||
| \(68 \div 4\) | M1 | |
| 17 | A1 | |
| their \(17 - 10\) or 7 | M1dep | dep on M1 |
| 49 | A1 | |
Additional guidance
Check for working on diagram