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### #11

Posted 04 March 2008 - 10:34 PM

### #12

Posted 04 March 2008 - 10:36 PM

He would need to go 50 + x backwards to reach his original position.

50-x would be the distance the soldier would need to go _forward_ after delivering the letter to be where the leading soldier will be once the platoon moved 50m.

ya, I agree. My point was to stress the original and new locations are different. Thanx for the correction.

### #13

Posted 04 March 2008 - 11:46 PM

He would need to go 50 + x backwards to reach his original position.

50-x would be the distance the soldier would need to go _forward_ after delivering the letter to be where the leading soldier will be once the platoon moved 50m.

Wait, is the answer a number? I thought it had to include some sort of variable -- I think the answer is

(100a^2)/(a^2 - b^2) where a is speed of soldier and b is the speed of the platoon

Can the poster please tell us real answer?

thank you

### #14

Posted 04 March 2008 - 11:53 PM

*The greatest challenge to any thinker is stating the problem in a way that will allow a solution.*

- Bertrand Russell

### #15

Posted 04 March 2008 - 11:59 PM

Spoiler for Looks like ...

sorry i found dumb, but how do we know the platoon went 50m when the soldier went back?

i thought that say the platoon barely moves and the soldier rans ultra fast (instanteous)

then the soldier ran 100 m

how are we coming out with a specific number? like 120.71 m?

### #16

Posted 05 March 2008 - 12:03 AM

Read the original post.sorry i found dumb, but how do we know the platoon went 50m when the soldier went back?

*The greatest challenge to any thinker is stating the problem in a way that will allow a solution.*

- Bertrand Russell

### #17

Posted 05 March 2008 - 12:06 AM

Read the original post.

LOL - paint me embarassed

### #18

Posted 05 March 2008 - 12:35 AM

then the total distance traveled by the soldier would be the same as the rest of the platoon

50 m

### #19

Posted 05 March 2008 - 04:36 PM

Strykr,Wait, is the answer a number? I thought it had to include some sort of variable -- I think the answer is

Can the poster please tell us real answer?

ya, the answer is a real number.

sorry i found dumb, but how do we know the platoon went 50m when the soldier went back?

In my original post, I said while the soldier was delivering the letter, the whole platoon moved ahead by 50m.

There is a 50m long army platoon marching ahead. The last person in the platoon wants to give a letter to the first person leading the platoon. So while the platoon is marching he runs ahead, reaches the first person and hands over the letter to him and without stopping he runs and comes back to his original position. In the mean time the whole platoon has moved ahead by 50m. The question is how much distance did the last person cover during that time?

### #20

Posted 05 March 2008 - 04:40 PM

I get how yall did the whole math part, but what if the total distance is looked at as positive for forward and negitive for the return

then the total distance traveled by the soldier would be the same as the rest of the platoon

50 m

Thatguyagain,

In that case, I would have used 'displacement' rather than distance. Don't you think so?

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