SOLUTION: At 6:00 a.m. a man left a town A and travelled toward a town B 19 miles away. At 6:30 another man started from B and travelled toward A. The two men met on the road at 8:30 a.m. If

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Question 339383: At 6:00 a.m. a man left a town A and travelled toward a town B 19 miles away. At 6:30 another man started from B and travelled toward A. The two men met on the road at 8:30 a.m. If the rate of the first traveller is 1/2 mile per hour less than that of the second,find the rate of each.
Pls. answer.Thank you.

Found 2 solutions by stanbon, josmiceli:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
At 6:00 a.m. a man left a town A and traveled toward a town B 19 miles away. At 6:30 another man started from B and traveled toward A. The two men met on the road at 8:30 a.m. If the rate of the first traveler is 1/2 mile per hour less than that of the second, find the rate of each.
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6:00 man DATA:
time = 2.5 hrs ; rate = x mph ; distance = 2.5x miles
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6:30 man DATA:
time = 2 hrs ; rate = x+1/2 mph ; distance = 2(x+(1/2)) = 2x+1 miles
======================
Equation:
distance + distance = 19 miles
2.5x + 2x+1 = 19 miles
4.5x = 18
x = 4 mph (rate of the 6:00 man)
x+(1/2) = 4.5 mph (rate of the 6:30 man)
============================================
Cheers,
Stan H.
=============

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Write an equation for both men:
d%5BA%5D+=+r%5BA%5D%2At%5BA%5D
and
d%5BB%5D+=+r%5BB%5D%2At%5BB%5D
given:
d%5BA%5D+%2B+d%5BB%5D+=+19
t%5BA%5D+=+2.5
t%5BB%5D+=+2
r%5BA%5D+=+r%5BB%5D+-+.5
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I can rewrite the equations of motion
d%5BA%5D+=+r%5BA%5D%2A2.5
and
19+-+d%5BA%5D+=+%28r%5BA%5D+%2B+.5%29%2A2
-d%5BA%5D+=+-19+%2B+2r%5BA%5D+%2B+1
d%5BA%5D+=+18+-+2r%5BA%5D
and, since both are equal to d%5BA%5D
2.5r%5BA%5D+=+18+-+2r%5BA%5D
4.5r%5BA%5D+=+18
r%5BA%5D+=+4
r%5BB%5D+=+r%5BA%5D+%2B+.5
r%5BB%5D+=+4.5
The 1st man's rate is 4 mi/hr
The 2nd man's rate is 4.5 mi/hr
check:
d%5BA%5D+=+r%5BA%5D%2A2.5
d%5BA%5D+=+4%2A2.5
d%5BA%5D+=+10 mi
and
d%5BB%5D+=+r%5BB%5D%2A2
d%5BB%5D+=+4.5%2A2
d%5BB%5D+=+9
d%5BA%5D+%2B+d%5BB%5D+=+19
OK