4400 Higher June 2009 Paper 3 Q20
20 Correct to 2 significant figures, the area of a square is 230 cm².
Calculate the lower bound for the perimeter of the square.
(3)
| Scheme | Marks |
|---|---|
| 225 seen | B1 |
| \(\sqrt{225}\) or 15 | B1 |
| 60 | B1 |
| (3) | |
| (3 marks) |
Notes
B1: Award B1 for 15 only if 225 seen
B1: cao
Award only if preceding 2 marks scored