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Assertion (A): The ten to one snow to water ratio is only a rough guide.
Reason (R): Fresh snow density varies by a factor of several between events.

  • A.Both A and R are true, but R is not the correct explanation of A
  • B.A is true but R is false
  • C.A is false but R is true
  • D.Both A and R are true, and R is the correct explanation of A

Answer: D

Both are true and the reason gives the variability, and cold dry conditions give much lighter snow. Forecasting depth therefore requires forecasting density as well. Depth forecasts are consequently less reliable than water equivalent.

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