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- Mathematics basic training in the second volume of the seventh grade
Mathematics basic training in the second volume of the seventh grade
Solution: When 1H is chasing, B has the fastest speed, set to X 1, and when 1.25H is chasing, B has the slowest speed, set to X2.
X 1=(2+ 1)*5
X 1= 15
1.25*X2=( 1.25+2)*5
X2= 13
So the range is within 13~ 15KM.
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