Identify the pair of variables that are NOT inversely proportional:

Identify the pair of variables that are NOT inversely proportional:
  1. Speed of a car and time to cover a fixed distance
  2. Number of pipes (same kind) and time to fill a fixed tank
  3. Number of pages typed and time, at a fixed rate
  4. Number of cattle and number of days a fixed stock of fodder lasts

Solution

More pages need more time at a fixed rate -- they are directly proportional, not inverse.

Asked in: IMO

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