SOLUTION: Tom and Carl start 200 miles apart, running towards each other. Tom runs 5 miles per hour faster than Carl. If they meet after 10 hours, how fast are they running? A. 10 mph and

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Question 603932: Tom and Carl start 200 miles apart, running towards each other. Tom runs 5 miles per hour faster than Carl. If they meet after 10 hours, how fast are they running?
A. 10 mph and 15 mph
B. 15 mph and 20 mph
C. 2.5 mph and 7.5 mph
D. 7.5 mph and 12.5 mph


Answer by ewatrrr(24785)   (Show Source): You can put this solution on YOUR website!
 
Hi,
Tom runs 5 miles per hour faster than Carl
Let r AND (r+5) represent Carl's and Toms's speeds respectively
Question states***
Tom and Carl start 200 miles apart, running towards each other.
they meet after 10 hours
Note: d = rt
rt + (r+5)t = 200
t[r +(r+5)] = 200
t = 200/(2r+5) = 10hrs
Solving for r
10(2r+5) = 200
2r + 5 = 20
2r = 15
r = 7.5, carls speed, tom's speed is 12.5
CHECKING our Answer***
7.5·10 + 12.5·10 = 75 + 125 = 200mi
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