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Two points on a river are 10.4km apart and one stands 400metres above the other. What ...

Two points on a river are 10.4km apart and one stands 400metres above the other. What is the gradient along the river between the points?
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  • A 1 in 20
  • B 1 in 24
  • C 1 in 26
  • D 1 in 32
  • E 1 in 36
Correct Answer: Option D
Explanation:

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