Elapsed TimeDate: 11/26/2002 at 15:23:37 From: Daniel Subject: Measuring elapsed time 9 hours 02 minutes - 6 hours 45 minutes Date: 11/27/2002 at 14:26:23 From: Doctor Sarah Subject: Re: Measuring elapsed time Hi Daniel - thanks for writing to Dr. Math. Let's look at the smaller number: 6 hrs. 45 min. Think of this as 6:45 or 45 minutes after six o'clock. How long will it take to get to the next whole hour, seven o'clock (7:00)? 15 more minutes, right? How long is it from 7:00 to 9:02? 2 hours, 2 minutes. Add the 15 minutes to the 2 hours, 2 minutes and you'll have an answer. It's easiest to do these problems looking at an analog clock. Here's a picture of one, in case all of your clocks are digital: - Doctor Sarah, The Math Forum http://mathforum.org/dr.math/ |
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