SOLUTION: Nacy left London traveling at forty MPH. Tom to catch up left some time later driving at forty - nine MPH Tom caught up after four hours how long was nacy driving before Tom caught

Question 809930: Nacy left London traveling at forty MPH. Tom to catch up left some time later driving at forty - nine MPH Tom caught up after four hours how long was nacy driving before Tom caught up?
Answer by TimothyLamb(4379) (Show Source): You can put this solution on YOUR website!
s = d / t
t = d / s
d = s * t
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D = 40n = 49t
D = 40n = 49*4
---
40n = 49*4
40n = 196
Answer:
n = 4.9 hours
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