Higher June 2019 Paper 1 Q13
13 The triangular cross section of a prism is an isosceles right-angled triangle.
The volume of the prism is 102 cm3
Use approximations to estimate the value of \(x\).
You must show your working. [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| One of \((102 \to)\ 100\) \((8.14 \to)\ 8\) | M1 | |
| their \(100 = 0.5 \times x^2 \times\) their 8 or \((x^2 =)\) their \(100 \div 8 \times 2\) or \((x^2 =)\ 100 \div\) their \(8 \times 2\) or 25 or their \(8 \times 5 \times 5 \times 0.5 = 100\) or \(8 \times 5 \times 5 \times 0.5 =\) their 100 | M1dep | oe must have used at least one correct 1 sf value |
| 5 with M2 seen | A1 |
Additional guidance
If working is done with approximations and with the given values ignore the working with the given values and mark the working with approximations