SOLUTION: A night watchman must check a certain storage area every 45 minutes. If he first checks the area as he begins a 9 hour tour of duty, how many times will he have checked this storag
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Question 1065783: A night watchman must check a certain storage area every 45 minutes. If he first checks the area as he begins a 9 hour tour of duty, how many times will he have checked this storage area?
Answer by math_helper(2461) (Show Source): You can put this solution on YOUR website!
This is a little tricky. Say he's just watching the storage area for 45 minutes, does he check it once or twice? I'll assume he checks it twice (at the very beginning and at the very end of the 45 minutes).
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9hrs is 9hrs*60min/hr = 540minutes. 540minutes/45minutes/check = 12
However, since 540/45 is exactly 12, he will check it one more time at the very end, so checks in all.
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The expression I am using is
Where floor(n) = largest integer <= n
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