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Old 07-22-10, 04:49 PM   #1
DnvrFox
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I Q Test for 50+'rs

If you have seen this before, please refrain from explaining the problem until some folks who haven't seen it before have an opportunity to post their responses. Hopefully, everyone gets it right!!

You bike 10 miles at 20 miles per hour and 10 miles at 10 miles per hour. What is your average speed?
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Old 07-22-10, 04:57 PM   #2
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Well, if you don't stop I come up with 13.3 mph. But wait, there's the DQ, and the A&W, and a donut shop, and a coffee shop, and a bakery. I'm going to be out here all day.
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Old 07-22-10, 04:58 PM   #3
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Aaaghhhh math problems... I didn't llike them when young!

15...
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Old 07-22-10, 05:04 PM   #4
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i got it! i got it!

the bike color is red.
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Old 07-22-10, 05:10 PM   #5
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Hi,

10 miles at 20 MPH = 30 minutes
10 miles at 10 MPH = 60 minutes
30 min + 60 min = 90 min = 1.5 hours
20 miles / 1.5 hours = 13.33 MPH

Unless my analysis is faulty, steve0257 wins.
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Old 07-22-10, 05:13 PM   #6
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Some advertisement was over the part where you asked what is your ? If asking for average speed, I get 13.3333333333333333333333333333333333333333333333333333333333333333333333333333333mph. If you want to know how old the rider is, it is 63.
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Old 07-22-10, 05:15 PM   #7
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Quote:
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Hi,

10 miles at 20 MPH = 30 minutes
10 miles at 10 MPH = 60 minutes
30 min + 60 min = 90 min = 1.5 hours
20 miles / 1.5 hours = 13.33 MPH

Unless my analysis is faulty, steve0257 wins.
No, wrong. The color of the bike is white.
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Old 07-22-10, 05:16 PM   #8
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Mannnnn.......... now I know why I need to buy a bike computer.
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Old 07-22-10, 05:20 PM   #9
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I have to go with 13.3 (as noted above)
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Old 07-22-10, 05:23 PM   #10
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Uphill, or down?
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Old 07-22-10, 05:24 PM   #11
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Uphill, or down?
You must be an engineer!!
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Old 07-22-10, 05:57 PM   #12
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The answer, as always, is my average was 18 mph and I am sticking to it (please don;t revoke my PhD )
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Old 07-22-10, 06:00 PM   #13
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You rode 20 MPH going to the cafe but could only manage 10 MPH on the way back. The difference is obviously Pi.
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Old 07-22-10, 06:02 PM   #14
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Have no idea, I was just to busy enjoying the "SMILES"!
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Old 07-22-10, 06:34 PM   #15
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Whatever the answer is, I'm sure it is way faster than I went today, even doping my Garmin was no help.
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Old 07-22-10, 07:10 PM   #16
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Are those metric hours, or imperial?
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Old 07-22-10, 07:32 PM   #17
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Retro Grouch: what I have never been able th figure out--somebody said Pi r square. I have always thought Pi r round.
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Old 07-22-10, 07:37 PM   #18
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I was told there would be no math when I joined this forum.
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Old 07-22-10, 07:59 PM   #19
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I was told there would be no math when I joined this forum.
"There is no match for this forum." That's what newcomers are told.
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Old 07-22-10, 08:50 PM   #20
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20 mph + 10 mph = 30 mph

Where did you guys go to school?

EDIT:

I'm sorry, that is TOTAL speed. For AVERAGE speed:

30 mph / 10 miles = 3 mph

Last edited by bgary; 07-22-10 at 08:55 PM.
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Old 07-22-10, 09:19 PM   #21
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Why you can't make it up on the descent:

You climb the 1 mile hill at 5 mph. Then you go back down 1 mile at 100,000 mph. What's your average speed?

Drag over the line to
highlight the answer---> 9.9995 mph = 2 miles / (.2 hrs +.00001 hrs) <--

Last edited by rm -rf; 07-22-10 at 09:43 PM.
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Old 07-22-10, 09:24 PM   #22
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...raise hand...

FULL MOON, FULL MOON, FULL MOON.....
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Old 07-22-10, 09:37 PM   #23
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This is easy. With all the factors accounted for and calculated properly, my average speed is, um, average.
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Old 07-22-10, 11:50 PM   #24
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Was I riding an African Swallow or a European Swallow?
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Old 07-23-10, 02:43 AM   #25
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Had an aha moment.

My average speed is ZERO, the bike is the one that is moving. There, that is my story and I will stick with that.
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