- #1

- 33

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This question stumped me for 10 min.

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- Thread starter nando94
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- #1

- 33

- 0

This question stumped me for 10 min.

- #2

Mark44

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Out of curiousity, what did you get for the average speed?

- #3

symbolipoint

Homework Helper

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This question stumped me for 10 min.

Yahhh, this question stumps me too since Jerry is driving 4 hours to get to work. Why is Jerry doing a job so far away? Then, 8 hours to drive back home. Jerry spends far too much time driving back and forth to this job. Jerry should find a job closer to home or relocate.

- #4

- 33

- 0

Out of curiousity, what did you get for the average speed?

I got 400/12 or 33.333

[2*Speed1*Speed2] / [speed1 + Speed2]

Thats the formula. Another way to do it is 50 + 50 + 50 + 50 + 25 + 25 + 25 + 25 + 25 + 25 + 25/12 or 400/12

At first I did 50+25/2 = 37.5 but thats the wrong answer since its asking the average for the entire trip. Thats when I realized that I had to add the entire distance traveled and divide it by the number in the set which is the arithmetic mean.

- #5

- 33

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Yahhh, this question stumps me too since Jerry is driving 4 hours to get to work. Why is Jerry doing a job so far away? Then, 8 hours to drive back home. Jerry spends far too much time driving back and forth to this job. Jerry should find a job closer to home or relocate.

haha yeah thats true.

- #6

HallsofIvy

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This question stumped me for 10 min.

I love it! You show how to get the answer while appearing to mock the question! Jerry drives a total of 400 miles in 12 hours.Yahhh, this question stumps me too since Jerry is driving 4 hours to get to work. Why is Jerry doing a job so far away? Then, 8 hours to drive back home. Jerry spends far too much time driving back and forth to this job. Jerry should find a job closer to home or relocate.

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