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What was the total driving time trip for 80 miles per hour one way to Phoenix and averaged 70 miles per hour and it took one hour longer to drive back home than Phoenix?
Wiki User
∙ 11y ago
Suppose the one-way distance is X miles.
The outward time = Distance/Outward speed = X/80 hours.
The return time = Distance/Return speed = X/70 hours.
The second journey was 1 hour longer, so X/70 - X/80 = 1
Multiply by 560: 8X - 7X = 560 so that X = 560.
Then outward time = 560/80 = 7 hours
return time = 560/70 = 8 hours
and
total time = 7 + 8 = 15 hours.
Wiki User
∙ 11y ago
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How many events happen when you drive one mile?
Infinitely many.I will use a variant of Zeno's paradox to illustrate this.Before you can drive a mile you must drive half a mile. So the event of driving a mile can be split into two sub-events of driving half a mile.But before you can drive half a mile you must drive a quarter of a mile. So the event of driving each half of a mile can be split into two sub-events of driving a quarter of a mile - making 4 sub-events in all.And then each of them can be split into two and so on, and on.Infinitely many.I will use a variant of Zeno's paradox to illustrate this.Before you can drive a mile you must drive half a mile. So the event of driving a mile can be split into two sub-events of driving half a mile.But before you can drive half a mile you must drive a quarter of a mile. So the event of driving each half of a mile can be split into two sub-events of driving a quarter of a mile - making 4 sub-events in all.And then each of them can be split into two and so on, and on.Infinitely many.I will use a variant of Zeno's paradox to illustrate this.Before you can drive a mile you must drive half a mile. So the event of driving a mile can be split into two sub-events of driving half a mile.But before you can drive half a mile you must drive a quarter of a mile. So the event of driving each half of a mile can be split into two sub-events of driving a quarter of a mile - making 4 sub-events in all.And then each of them can be split into two and so on, and on.Infinitely many.I will use a variant of Zeno's paradox to illustrate this.Before you can drive a mile you must drive half a mile. So the event of driving a mile can be split into two sub-events of driving half a mile.But before you can drive half a mile you must drive a quarter of a mile. So the event of driving each half of a mile can be split into two sub-events of driving a quarter of a mile - making 4 sub-events in all.And then each of them can be split into two and so on, and on.
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