SOLUTION: I need help solving the problem: The Great Seto Bridge in Japan is about 7.6 mi long. How long would it take you to cross the bridge if you were walking at 3mi/hr? This is wh

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Question 220543: I need help solving the problem:
The Great Seto Bridge in Japan is about 7.6 mi long. How long would it take you to cross the bridge if you were walking at 3mi/hr?
This is what I have done:
I set up a chart:
Rate:4 Time:t Distance:7.6

So would it be 4t=7.6?
I have no idea what I am doing. Please help. Your guidance would be greatly appreciated.
Thank you.
-Michelle
(Freshman)
Found 2 solutions by jim_thompson5910, josmiceli:
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
Recall that the distance 'D' is related to the rate/speed 'r' and time 't' by the formula: D=rt (ie multiply the speed by the time to get the distance traveled).


D=rt


7.6=3t Plug in D=7.6 (the given distance) and r=3 (the given speed)


Now the goal is to simply solve for 't':


7.6%2F3=t Divide both sides by 3 to isolate 't'.


2.533=t Divide 7.6 into 3 to get 2.533 (this is approximate).


t=2.533 Rearrange the equation.


So the solution is t=2.533 which means that it takes about 2.5 hours to walk 7.6 miles.

Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
d+=+r%2At
given:
r+=+4+ mi/hr
d+=+7.6 mi
7.6+=+4%2At
Divide both sides by 4
t+=+7.6%2F4
t+=+1.9 hrs
It would take 1.9 hrs to cross bridge