1MA0 Higher November 2012 Paper 2 Q7
7 160 cm of gold wire has a weight of 17.8 grams.
Work out the weight of 210 cm of the gold wire. (3)
| Working | Answer | Mark | Notes |
|---|---|---|---|
| 17.8 ÷ 160 × 210 = 0.11125 × 210 = 23.3625 g OR 210 ÷ 160 × 17.8 = 1.3125 × 17.8 = 23.3625 g OR 210 − 160 (=50) \(\frac{17.8}{160} \times\) ‘50’ (= 5.5625) 17.8 + 5.5625 | 23.3(625) | 3 | M1 17.8 ÷ 160 (=0.11125) or 17.8 × 210 (=3738) or 210 ÷ 160 (=1.3125) M1 (dep) ‘0.11125’ × 210 or ‘3738’÷160 or ‘1.3125’× 17.8 A1 for answer in range 23.3 - 23.4 OR M1 for \(\frac{17.8}{160} \times (210 - 160)\) (= 5.5625) M1 (dep) for 17.8 + ‘5.5625’ A1 for answer in range 23.3 - 23.4 OR M1 for correct method to find weight of 2 cm or 5 cm or 10 cm M1 (dep) for complete method A1 for answer in range 23.3 - 23.4 |