drew98 drew98
  • 13-05-2018
  • Mathematics
contestada

It takes a night security officer 20 mins to check each of the doors in an office building to make sure they are locked. What is the officers rate of work ?

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jeanaclark52 jeanaclark52
  • 13-05-2018
If the number of doors is not given, then his rate of work would be he could check 3 doors in an hour. 60 minutes in an hour. 60/20=3
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