4MA0 Higher June 2014 Paper 4R Q10
10 Mortar mix is made by mixing cement, sand and quicklime in the ratio 1 : 2 : 3
(a) Work out the volume of sand needed to make 2.1 m3 of mortar mix. (2)
Julie has 0.75 m3 of quicklime.
She has plenty of sand and cement.
(b) Work out the greatest volume of mortar mix she could make. (2)
| Scheme | Marks |
|---|---|
| 2.1 ÷ ( 1 + 2 + 3 ) (= 0.35) or 2.1 ÷ 6 2.1 ÷ ( 1 + 2 + 3 ) × 2 or 2.1 ÷ 6 × 2 oe | M1 |
| 0.7 | A1 |
| (2) |
Notes
M1: allow 2.1 ÷ ( 1 + 2 + 3 ) × 3 (=1.05) for the method mark
A1: (accept 0.70)
| Scheme | Marks |
|---|---|
| eg. 6 ÷ 3 = 2 and 2 × 0.75 or \(\dfrac{0.75}{3} \times 6\) oe | M1 |
| 1.5 | A1 |
| (2) | |
| (4 marks) |
Notes
M1: for a complete method
A1: cao