[问答题]
Every night a street
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The diagram below shows his designated area, with the weights indicating the time, in minutes, it takes to clean each street, and intersections indicated by letters.
The street cleaner must clean every street and wishes to minimise the time the task will take.
1. The street cleaner starts and finishes at the company depot, located at point K. Determine the total time it will take him to complete his task.
A new road is to be constructed directly from the intersection at point B to the intersection at point G, and it is estimated that this street will take 25 minutes to clean. The street cleaner has also been told he can now start the job at any intersection, and finish at any other intersection, and another employee will pick him up and drop him off.
2. Determine the difference in total time the job will take once the new road is completed.
