Foundation November 2021 Paper 3 Q13
13 In the Northern hemisphere the ratio of the area of land to the area of water is \(2 : 3\)
(a) Work out what percentage of the area of the Northern hemisphere is land. (2)
20% of the area of the Southern hemisphere is land.
(b) Work out the ratio of the area of land to the area of water in the Southern hemisphere. (2)
| Answer | Mark | Mark scheme |
|---|---|---|
| 40 | M1 | \(2 \div (2 + 3) \times 100\ (= 40)\) or build up to (and shows) \(40 : 60\) oe or for sight of \(\dfrac{2}{5}\) oe or \(100 \div 5\ (= 20)\) |
| A1 | cao |
| Answer | Mark | Mark scheme |
|---|---|---|
| \(20 : 80\) | M1 | \(100 - 20\ (= 80)\) or \(80 : 20\) oe |
| A1 | \(20 : 80\) oe |
Additional guidance
Accept any equivalent ratio; award full marks if an acceptable ratio is given and then incorrectly simplified.