Foundation June 2018 Paper 1 Q7
7. A model of a house is made using the scale 1 : 50.
(a)
A window on the model is 4 cm high.
What is the height of the window on the actual house? [1]
(b)
Chris makes a door on the model 3 cm wide.
The door of the actual house is 75 cm wide.
Has Chris made the door the correct width?
Show how you decide. [1]
(c)
A wall in the actual house is 2 metres 50 centimetres high.
How high should this wall be in the model house?
Give your answer in centimetres. [2]
| Scheme | Marks | Comments |
|---|---|---|
| 200 (cm) or 2 m(etres) | B1 | ISW |
| Scheme | Marks | Comments |
|---|---|---|
| No stated or implied with valid reason e.g. ‘3 : 75 is 1 : 25 (not 1 : 50).’ or ‘3cm is 150 cm (not 75 cm).’ or ‘It should have been 1.5 cm’ | E1 | Allow e.g. ‘No, he needs to divide 75 by 50 to get the size of the model’s door.’ or ‘No it is twice as wide as it should be.’ or ‘3 × 25 = 75’ or ‘3 × 50 = 150’ |
| Scheme | Marks | Comments |
|---|---|---|
| 250 ÷ 50 or 2.5 ÷ 50 | M1 | For division by 50 Allow e.g. 2 m 50 cm ÷ 50 or for 50 × 5 = 250 |
| 5 (cm) | A1 | CAO |
| (4) |