How Many Time Slots There Are Between The Start And End Times

Oct 20, 2010

var startTime = new DateTime(2010, 10, 1, 9, 0, 0);
var endTime = new DateTime(2010, 10, 1, 16, 0, 0);
var interval = 11;

So given a start time of 9am, an end time of 4pm and an interval of 11 how can I find out how many time slots there are between the start and end times?Does that make sense? I know the answer will be 43 time slots, but how to derive it?

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