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Bunuel
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David is hiking the Appalachian Trail, which is 2100 miles long. He 20 Nov 2022, 12:15
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59% (01:21) correct 41% (01:25) wrong based on 311 sessions

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David is hiking the Appalachian Trail, which is 2100 miles long. He plans to go into town to call home once he has hiked more than 20 percent of the total distance. If David has already hiked 1 percent of the trail, what is the minimum number of additional miles that he must hike before he goes into town?

A. 399

B. 400

C. 401

D. 420

E. 421
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B
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deevs
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David is hiking the Appalachian Trail, which is 2100 miles long. He Updated on: 20 Nov 2022, 20:42
Originally posted by deevs on 20 Nov 2022, 19:20.
Last edited by deevs on 20 Nov 2022, 20:42, edited 1 time in total.
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20% of 2100=420
>420=420+1=421
1% of 2100=21
so min distance= 421-21=400
Hence B
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bellbell
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David is hiking the Appalachian Trail, which is 2100 miles long. He 20 Nov 2022, 19:52
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20% = 420 => more than 20% = at least 421
1% = 21
=> 421-21 = 400
=> B.
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David is hiking the Appalachian Trail, which is 2100 miles long. He 24 Apr 2025, 00:19
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deevs
20% of 2100=420
>420=420+1=421
1% of 2100=21
so min distance= 421-21=400
Hence B
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Hi, I believe you have added 1 to 420 because the question says more than 20%, but could it not be a fraction of a mile? That would also satisfy the "more than" condition - in which case, the minimum number of additional miles will not be 400, rather 399. Am I missing something here?
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David is hiking the Appalachian Trail, which is 2100 miles long. He 24 Apr 2025, 06:17
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ujjwalg98
deevs
20% of 2100=420
>420=420+1=421
1% of 2100=21
so min distance= 421-21=400
Hence B
Hi, I believe you have added 1 to 420 because the question says more than 20%, but could it not be a fraction of a mile? That would also satisfy the "more than" condition - in which case, the minimum number of additional miles will not be 400, rather 399. Am I missing something here?
Show more
I think you are right when you say it can be a fraction of a mile but it is not part of the answer options here, so we have to pick the next best minimum option which is 400. If you pick 399, the percentage of completion will only be 20% which does not fulfil the criteria of more than 20%. Hope it helps!
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