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Traffic Calming (Posted on 2005-02-17) Difficulty: 3 of 5
You are travelling at a constant speed along a road. There are 5 sets of traffic lights along this road, and they all start their sequence at the same time as you pass the zero mile marker.

At what speed do you need to travel in order to remain at your constant speed?

    traffic light 1 at 3 miles is red for 36 secs and green for 22 secs.
    traffic light 2 at 4 miles is red for 28 secs and green for 40 secs.
    traffic light 3 at 6 miles is red for 41 secs and green for 17 secs.
    traffic light 4 at 7 miles is red for 62 secs and green for 15 secs.
    traffic light 5 at 9 miles is red for 46 secs and green for 25 secs.

Note, the speed is an integer, above 25 and below 100MPH.

See The Solution Submitted by Juggler    
Rating: 4.2500 (4 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
Good | Comment 12 of 13 |
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  Posted by Amanda on 2018-09-22 05:52:55
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