On a map the vertical interval between two points is 20 m and the horizontal distance is 200 m. What is the gradient, written as 1 in n?
Answer and explanation
Correct answer: C. 1 in 10
- Step 1: Gradient = vertical interval : horizontal distance = 20 : 200. Step 2. Divide both by 20 to give 1 in 10. Answer: 1 in 10. Why not the others: 1 in 100: That is ten times too gentle. 1 in 180: That subtracts the two distances. 10 in 1: That reverses the ratio.
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