five tires

[tRNA]

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the five tires that came with steve's car were rotated frequently so that each tire was used exactly the same amount of time as the others. the tires were replaced when the odometer read 24000 miles. for how many miles had each been used?
does anyone see how the answer should be 19200??

 

[BodybldgDoc]

the five tires that came with steve's car were rotated frequently so that each tire was used exactly the same amount of time as the others. the tires were replaced when the odometer read 24000 miles. for how many miles had each been used?
does anyone see how the answer should be 19200??

4 tires * 24000 miles = 96000
But each tire was rotated frequently so 96000/5=19200 miles per tire