Foundation November 2018 Paper 2 Q17
17 Adrian is going to make concrete.
He is going to use
180 kg of cement
375 kg of sand
1080 kg of stone
Cement, sand and stone are sold in bags.
| 1 bag cement | 1 bag sand | 1 bag stone |
| 25 kg | 22.5 kg | 50 kg |
Adrian already has
10 bags of cement
20 bags of sand
20 bags of stone
Work out what bags he needs to buy to make the concrete. (3)
| Answer | Mark | Mark scheme |
|---|---|---|
| 2 bags of stone | P2 | for a complete process to work out how many bags of each material is required eg \(180 \div 25\) (= 7.2 or 8), \(375 \div 22.5\) (= 16.6.. or 17), \(1080 \div 50\) (= 21.6 or 22) or a complete process to work out the total weight of each element that he has eg \(25 \times 10\ (= 250)\), \(20 \times 22.5\ (= 450)\), \(50 \times 20\ (= 1000)\) |
| (P1 | for a correct start to the process, eg for at least one correct calculation | |
| C1 | correct conclusion eg 2 bags of stone, with no incorrect working |
Additional guidance
The correct figures do not need to be seen to award the process marks