
Don L. answered 03/19/15
Tutor
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Don - Math/Science Tutor from Elementary School to College level
this question is be tricky depending on how to look at it.
Jon's concept is correct when you assume the time start after leaving the first steps and will end after leaving the 10th steps. it means you have to take another 30 sec to leave the 10th steps.
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the vertical line represents the steps (10)
the horizontal line represents the time between steps (10)
the horizontal line represents the time between steps (10)
5 min = 300 sec
300/10 = 30 sec between two steps
here is another possibility.
it's possible that the time start after leaving the first step and will end when you step on the 10th step. if that's the case then the time between two steps is different.
Here is the line graph that can show you what I meant
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the vertical line represents the steps (10)
the horizontal line represents the time between steps (9)
I assumed the time starts after you leave the first step and end when you reach to the 10th step. (i.e. time will stop once you step on the last step)
that means the only 9 (horizontal lines) occurred.
for 5 min = 300 sec
300/9 = 33.33333 sec between two steps