4MA0 Foundation June 2014 Paper 2R Q24
24 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 m\(^3\) of mortar mix. (2)
Julie has 0.75 m\(^3\) 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 \(\dfrac{6}{3} \times 0.75\) oe | M1 |
| 1.5 | A1 |
| (2) | |
| (Total 4 marks) |
Notes
M1: for a complete method
A1: cao