your uncle buys a new car that comes with seven new tires, one for each wheel and three spare tires. He decides to be economical by using the tree spares as much as the other four tires. If he drives 22,750 miles and each tire has been used equally, what will be the wear in miles on each tire?
i think that you would divide the total miles by seven and that is your answer, 22,750 is divisible by 7, the number is 3,250. but i feel that is too easy.
well, can someone tell me if I'm doing this right?
THANKS!
I think you're right as far as you went. However, if each tire went 3,250 miles, then the car would only have one tire at a time. <g>
How about multiplying: 3,250 * 4 = 13,000 miles.
That makes sense because if he'd started with 8 tires and changed 4 tires at the halfway point (22,750 / 2) each tire would have 11,375 miles of wear.
what you have, i understand, but he bought seven, not eight, so, thank you for telling me that, except now i'm stuck.
I think the answer is that each tire would have 13,000 miles of wear.
ok, so how did you get that??
multiplying: 3,250 * 4 = 13,000 miles.
You're on the right track! One way to approach this problem is to divide the total distance driven (22,750 miles) by the total number of tires (7 tires) to get the wear on each individual tire. So, your calculation of 22,750/7 = 3,250 miles is correct.
However, since your uncle has three spare tires, it means that those tires are not used as frequently as the other four tires. To account for this, we can divide the total distance driven (22,750 miles) by the total number of tires in use (4 tires) to find the wear on each of those tires.
So, you would calculate 22,750/4 = 5,687.5 miles as the wear on each of the four tires that are used regularly.
Then, since the spare tires are not used as often, their wear will be less. To find the wear on each spare tire, you can divide the total distance driven (22,750 miles) by the number of spare tires (3 tires).
So, the wear on each spare tire would be 22,750/3 = 7,583.33 miles.
Therefore, the wear on each of the four regularly used tires is approximately 5,687.5 miles, and the wear on each of the three spare tires is approximately 7,583.33 miles.