Foundation June 2024 Paper 2 Q20
20 The mass of an iceberg is 2 200 000 kg
This value is a 12% reduction from the original mass of the iceberg.
Work out the original mass of the iceberg.
Give your answer in standard form. [3 marks]
| Answer | Mark | Comments |
|---|---|---|
| 88(%) or 0.88 | M1 | oe eg \(1 - 0.12\) |
| \(2\,200\,000 \div 88\) (\(\times\) 100) or 25 000 (\(\times\) 100) | M1dep | oe eg \(2.2 \times 10^6 \div (100 - 12)\) (\(\times\) 100) or \(2\,200\,000 \times [1.136, 1.14]\) or 2 500 000 |
| \(2.5 \times 10^6\) | A1 | oe standard form eg \(2.500\,000 \times 10^6\) SC1 \(2.2 \times 10^6\) oe standard form seen SC1 any value seen converted to standard form |
Additional guidance
| M1 or SC1 may be awarded for correct work with no answer or incorrect answer, even if this is seen amongst multiple attempts | |
| M1 may be seen in a trial or incorrect working eg \(3\,000\,000 \times 0.88\) or 88% of 2 200 000 | M1 |
| \(2\,200\,000 \div 88\%\) not recovered | M1M0 |
| \(2\,200\,000 \times 1.12 = 2\,464\,000\) \(2.464 \times 10^6 = 2.5 \times 10^6\) | SC1 |