4400 Higher June 2004 Paper 4 Q5
5 Plumbers’ solder is made from tin and lead.
The ratio of the weight of tin to the weight of lead is \(1 : 2\)
(a) Work out the weight of tin and the weight of lead in 120 grams of plumbers’ solder. (2)
(b) What weight of plumbers’ solder contains 25 grams of tin? (1)
| Scheme | Marks |
|---|---|
| tin 40 | B1 |
| lead 80 | B1 |
| (2) |
Notes
B1: cao
B1: cao
| Scheme | Marks |
|---|---|
| 75 | B1 |
| (1) | |
| (3 marks) |
Notes
B1: cao