On a map the vertical interval between two points is 10 m and the horizontal distance is 300 m. What is the gradient, written as 1 in n?
Answer and explanation
Correct answer: B. 1 in 30
- Step 1: Gradient = vertical interval : horizontal distance = 10 : 300. Step 2. Divide both by 10 to give 1 in 30. Answer: 1 in 30. Why not the others: 1 in 300: That is ten times too gentle. 1 in 290: That subtracts the two distances. 30 in 1: That reverses the ratio.
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