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

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?
  • 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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