4400 Higher November 2007 Paper 3 Q18
18 Some cases have to be lifted by a crane.
Each case has a mass of 68 kg, correct to 2 significant figures.
(a) Write down the upper bound of the mass of a case. (1)
A crane can lift safely a load of 1200 kg, correct to 2 significant figures.
(b) Find the greatest number of cases that the crane can lift safely in one load. (3)
| Scheme | Marks |
|---|---|
| 68.5 | B1 |
| (1) |
Notes
B1: or \(68.4\dot{9}\) (with dot) or 68.499 (at least two 9’s) or 68.49.....
| Scheme | Marks |
|---|---|
| 1150/“68.5” | M1 |
| 16.8 | A1 |
| 16 | A1 |
| (3) | |
| (4 marks) |