Aptitude Question:
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A car has run 10000 miles using 5 treys interchangeably, To have a equal worn out by all treys how many miles each Tyre should have run?

Answer:

each tire with 8000 miles
2 2

2 2 reserve tire=0miles now change the tire,

after 2000miles

2 4

4 4 reserve tire=2000miles

after 2000miles
4 4

6 6 reserve tire=4000miles now change the tire,
after 2000miles

6 6

8 6 reserve tire=6000

after 2000miles

8 8

8 8 reserve tire=8000


so ans is 8000.

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