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Flying off course quiz (Read 509 times)
Mar 22
nd
, 2009 at 12:06pm
aussiewannabe
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Colonel
Directive!
Posts: 2541
An airplane departs from point A with a destination of point B, 200 miles away. Halfway there, the pilot finds he is one mile off course. He makes a correction and flies directly to point B. How much extra distance did he fly by being off course?
A) 1/100 of a mile
B) One mile
C) Two miles
D) 20 miles
Don't quess. Show the math
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Reply #1 -
Mar 22
nd
, 2009 at 12:16pm
Craig.
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Birmingham
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Posts: 18590
Is this by any chance your maths homework that you can't be bothered to do on your own?
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Reply #2 -
Mar 22
nd
, 2009 at 12:33pm
aussiewannabe
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Colonel
Directive!
Posts: 2541
Craig. wrote
on Mar 22
nd
, 2009 at 12:16pm:
Is this by any chance your maths homework that you can't be bothered to do on your own?
You're joking, right?
Found this question in today's newspaper (complete with the answer).
Lighten up!
And no, I don't do homework
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Reply #3 -
Mar 22
nd
, 2009 at 1:09pm
pepper_airborne
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Voorhout - The Netherlands
Posts: 2390
I think i figured out the math, i just dont have a calculator nearby to do it. And the windows calculator is a tad bit vague.
http://white-line.org/&&
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Reply #4 -
Mar 22
nd
, 2009 at 1:17pm
C
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Colonel
Earth
Posts: 13144
Just a shade under 1/100 of a mile.
I did post how I got there, but then again, that would ruin it for anyone else, so I've removed it.
«
Last Edit: Mar 22
nd
, 2009 at 6:12pm by C
»
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Reply #5 -
Mar 22
nd
, 2009 at 1:37pm
pepper_airborne
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Voorhout - The Netherlands
Posts: 2390
Then my calculation wasnt as far off as i though it was
.
http://white-line.org/&&
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Reply #6 -
Mar 22
nd
, 2009 at 2:00pm
C
Offline
Colonel
Earth
Posts: 13144
pepper_airborne wrote
on Mar 22
nd
, 2009 at 1:37pm:
Then my calculation wasnt as far off as i though it was
.
Something to do with a geezer called Pythagoras I think.
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Reply #7 -
Mar 22
nd
, 2009 at 3:01pm
Brett_Henderson
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EVERY OUTER MARKER SHOULD
BE AN NDB
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Posts: 3593
C wrote
on Mar 22
nd
, 2009 at 1:17pm:
Just a shade under 1/10 of a mile.
I did post how I git there, but then again, that would ruin it for anyone else.
(((100^2 + 1^2)^0.5)-100)*2
(10,001^0.5-100)*2
0.0099997500124992188046833987597394
Or ~ 1/100
The answer is
A
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Reply #8 -
Mar 22
nd
, 2009 at 3:10pm
Fozzer
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Colonel
An elderly FS 2004 addict!
Hereford. England. EGBS.
Posts: 24861
Brett_Henderson wrote
on Mar 22
nd
, 2009 at 3:01pm:
C wrote
on Mar 22
nd
, 2009 at 1:17pm:
Just a shade under 1/10 of a mile.
I did post how I git there, but then again, that would ruin it for anyone else.
(((100^2 + 1^2)^0.5)-100)*2
(10,001^0.5-100)*2
0.0099997500124992188046833987597394
Or ~ 1/100
The answer is
A
WOW!...
...!
That's the same calculation I use to measure the necessary weight of Cornflower to liquid, to get my Gravy to the right constancy!....
...!
Paul...Mathematics in Cooking...
...!
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Reply #9 -
Mar 22
nd
, 2009 at 3:18pm
pepper_airborne
Offline
Colonel
Voorhout - The Netherlands
Posts: 2390
C wrote
on Mar 22
nd
, 2009 at 2:00pm:
pepper_airborne wrote
on Mar 22
nd
, 2009 at 1:37pm:
Then my calculation wasnt as far off as i though it was
.
Something to do with a geezer called Pythagoras I think.
How'd you guess eh?
Smart fella for sure!
http://white-line.org/&&
;
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Reply #10 -
Mar 22
nd
, 2009 at 5:14pm
aussiewannabe
Offline
Colonel
Directive!
Posts: 2541
Brett_Henderson wrote
on Mar 22
nd
, 2009 at 3:01pm:
C wrote
on Mar 22
nd
, 2009 at 1:17pm:
Just a shade under 1/10 of a mile.
I did post how I git there, but then again, that would ruin it for anyone else.
(((100^2 + 1^2)^0.5)-100)*2
(10,001^0.5-100)*2
0.0099997500124992188046833987597394
Or ~ 1/100
The answer is
A
Correct!!
Here's the answer from the paper:
A)1/100 of a mile. The pilot had flown about 100.005 miles (the square root of 100 squared divided by 1 squared) at the halfway point. So he had flown 200.01 miles by the time he got to his destination.
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Reply #11 -
Mar 22
nd
, 2009 at 5:38pm
C
Offline
Colonel
Earth
Posts: 13144
aussiewannabe wrote
on Mar 22
nd
, 2009 at 5:14pm:
Here's the answer from the paper:
A)1/100 of a mile. The pilot had flown about 100.005 miles (the square root of 100 squared divided by 1 squared) at the halfway point. So he had flown 200.01 miles by the time he got to his destination.
Is that verbatim? If so the paper is astonishingly inaccurate. If they bother to do the basic maths (math for our transatlantic cousins
)...
Quote:
the square root of 100 squared
Is that the "sqrt of (100^2)" [ie, 100], or the "(sqrt of 100)^2" [again 100, but a completely different meaning!]...
Quote:
divided by 1 squared
...which is, er, 1.
or, the square root of...
Quote:
100 squared divided by 1 squared
...which is 10,000/1, of which the sqrt is 100.
At no stage does their answer get anywhere near explaining where
they
got their extra 0.005 from.
If of course they'd said:
Quote:
(the square root of (100 squared
plus
1 squared))
They'd have been right.
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Reply #12 -
Mar 22
nd
, 2009 at 5:58pm
Brett_Henderson
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Colonel
EVERY OUTER MARKER SHOULD
BE AN NDB
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Posts: 3593
Ummm.. who was it that said the answer was 1/10
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Reply #13 -
Mar 22
nd
, 2009 at 6:13pm
C
Offline
Colonel
Earth
Posts: 13144
Brett_Henderson wrote
on Mar 22
nd
, 2009 at 5:58pm:
Ummm.. who was it that said the answer was 1/10
I knew what I meant. Typo on my part.
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Reply #14 -
Mar 22
nd
, 2009 at 7:56pm
aussiewannabe
Offline
Colonel
Directive!
Posts: 2541
C wrote
on Mar 22
nd
, 2009 at 5:38pm:
Is that verbatim?
Yes, unfortunately the paper is not in error as I mistyped what I believed was a divide sign. Sorry, but my eyesight is slightly diminished due to having cataracts. Not too keen reading text on glossy paper.
I got a second opinion. It is a plus sign not a divide sign.
I apologize for the error on my part.
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Reply #15 -
Mar 23
rd
, 2009 at 7:42am
C
Offline
Colonel
Earth
Posts: 13144
aussiewannabe wrote
on Mar 22
nd
, 2009 at 7:56pm:
C wrote
on Mar 22
nd
, 2009 at 5:38pm:
Is that verbatim?
Yes, unfortunately the paper is not in error as I mistyped what I believed was a divide sign. Sorry, but my eyesight is slightly diminished due to having cataracts. Not too keen reading text on glossy paper.
I got a second opinion. It is a plus sign not a divide sign.
I apologize for the error on my part.
No worries.
Just seemed a little odd!
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