4MA0 Higher January 2013 Paper 3 Q12
12 Make \(h\) the subject of the formula \(A = 2\pi r(r + h)\)
(2)
| Scheme | Marks |
|---|---|
| \(\dfrac{A}{2\pi r} = r + h\) or \(A = 2\pi r^2 + 2\pi rh\) | M1 |
| \(\dfrac{A}{2\pi r} - r = h\) oe | A1 |
| (2) |
Notes
M1: Correct first step
A1: e.g. \(\dfrac{A - 2\pi r^2}{2\pi r}\) Give full credit to equivalent correct expressions