SOLUTION: Bob drove home to work at 30mph. After work the traffic was heavier, and he drove home at 25 mph. His driving time to and from work was 1 hour and 6 minutes. How far does he liv
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Question 936252: Bob drove home to work at 30mph. After work the traffic was heavier, and he drove home at 25 mph. His driving time to and from work was 1 hour and 6 minutes. How far does he live from his job Found 2 solutions by TimothyLamb, mananth:Answer by TimothyLamb(4379) (Show Source):
You can put this solution on YOUR website! x = distance from home to work
a = driving time home to work
b = driving time work to home
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s = d/t
t = d/s
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driving time home to work:
a = x/30
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driving time work to home:
b = x/25
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total time:
a + b = 1 + 6/60
a + b = 1.1
x/30 + x/25 = 1.1
25x/(25*30) + 30x/(25*30) = 1.1
25x + 30x = 1.1*(25*30)
55x = 1.1*(25*30)
x = 1.1*(25*30)/55
x = 15
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answer:
x = distance from home to work = 15 miles
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You can put this solution on YOUR website! let distance from work place to home be x miles
time while going = x/30
time returning = x/25
total time = 1 hour 6 minutes = 1 6/60 = 11/10 hours
x/30 + x/25 = 11/10
multiply equation by LCM 150
150*x/30 + 150*x/25 = 150*11/10
5x+6x=165
11x=165
/11
x=15
Distance = 15 miles
