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#1 2013-07-24 04:28:51

anna_gg
Member
Registered: 2012-01-10
Posts: 113

Bridge and river

Person A left Town X at 10:18 am. He walked at a constant speed and arrived at town Z at 1:30 pm. On the same day, Person B left town Z at 9 am. Person B walked the same route in the opposite direction at a constant speed. Person B arrived at town X at 11:40 am. The road crosses a wide river. By coincidence, both arrived at the bridge on opposite sides of the river at the same instant. Person A left the bridge 1 minute later than Person B. At what time did they arrive at the bridge?

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#2 2013-07-25 03:46:45

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,406

Re: Bridge and river

Hi;


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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#3 2013-08-01 21:52:24

anna_gg
Member
Registered: 2012-01-10
Posts: 113

Re: Bridge and river

bobbym wrote:

Hi;

Correct! Thank you!!!

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#4 2013-08-01 22:30:18

bobbym
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 85,406

Re: Bridge and river

Hi;

You are welcome. Thanks for the problem.


In mathematics, you don't understand things. You just get used to them.
Of course that result can be rigorously obtained, but who cares?
Combinatorics is Algebra and Algebra is Combinatorics.

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