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![[Post New]](/templates/default/images/icon_minipost_new.gif) 6 Apr 2007 21:10:46 IST
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Let they meet each other at distance x from B and at time t and let the total distance of journey be l.
Let the speed of second man be u.
Speed of first man = 12
When they meet :
x = 12t and l - x = vt
Dividing these two : v/12 = (l - x)/x........(1)
The journey after meeting :
1st man would now cover l - x distance in 10/3 hours.
Hence l - x = 12(10/3) = 40............(2)
2nd would cover x distance in 24/5 hours.
Hence x = v(24/5).................(3)
From (1) v/12 = (l - x)/x = 40/x
x = 480/v
Put this in (3)
480/v = v(24/5)
v2 = 480(5/24) = 100
Hence v = 10 km/hr
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Bipin Kumar Dubey
Chemical Dept.
IIT Kharagpur
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this reply: 7 points
(with 1 
in 2 votes ) [?]
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