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When running a mile during a recent track meet, Nuria was initially

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When running a mile during a recent track meet, Nuria was initially  [#permalink]

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New post 29 Feb 2016, 10:42
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When running a mile during a recent track meet, Nuria was initially credited with a final time of 5 minutes, 44 seconds. Shortly after her run, officials realized that the timing mechanism malfunctioned. The stopwatch did not begin timing her until 11/25 of a minute after she began to run. If the time was otherwise correct, how long did it actually take Nuria to run the mile?

A. 5 minutes, 17.6 seconds
B. 5 minutes, 21.8 seconds
C. 5 minutes, 43.56 seconds
D. 5 minutes, 44.44 seconds
E. 6 minutes, 10.4 seconds

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When running a mile during a recent track meet, Nuria was initially  [#permalink]

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New post 29 Feb 2016, 17:15
11/25=.4400 minute
44 seconds=.7333 minute
.4399+5+.7333=6.1732 minutes=6 minutes, 10.4 seconds
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Re: When running a mile during a recent track meet, Nuria was initially  [#permalink]

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New post 01 Mar 2016, 11:48
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Bunuel wrote:
When running a mile during a recent track meet, Nuria was initially credited with a final time of 5 minutes, 44 seconds. Shortly after her run, officials realized that the timing mechanism malfunctioned. The stopwatch did not begin timing her until 11/25 of a minute after she began to run. If the time was otherwise correct, how long did it actually take Nuria to run the mile?

A. 5 minutes, 17.6 seconds
B. 5 minutes, 21.8 seconds
C. 5 minutes, 43.56 seconds
D. 5 minutes, 44.44 seconds
E. 6 minutes, 10.4 seconds


One approach:
The watch starts to work after Nuria began his running. It means the time should be greater than credited 5 minutes, 44 seconds. The only number is 6 minutes, 10.4 seconds.

Another approach:
11/25 close to 30 second when added to the 5 minutes, 44 seconds, it means it passes 6 minute.


Answer: E
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Re: When running a mile during a recent track meet, Nuria was initially  [#permalink]

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New post 18 Jan 2018, 11:34
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Bunuel wrote:
When running a mile during a recent track meet, Nuria was initially credited with a final time of 5 minutes, 44 seconds. Shortly after her run, officials realized that the timing mechanism malfunctioned. The stopwatch did not begin timing her until 11/25 of a minute after she began to run. If the time was otherwise correct, how long did it actually take Nuria to run the mile?

A. 5 minutes, 17.6 seconds
B. 5 minutes, 21.8 seconds
C. 5 minutes, 43.56 seconds
D. 5 minutes, 44.44 seconds
E. 6 minutes, 10.4 seconds


The long approach is to meticulously convert 11/25 of a minute to seconds, and then ADD that unaccounted time to Nuria's recorded time (of 5 minutes, 44 seconds)
However, when we check the answer choices before performing any calculations (ALWAYS check the answer choices before performing any calculations), we see that most answers are LESS THAN 5 minutes, 44 seconds

Now notice that 11/25 is kind of close to 1/2
So, 11/25 minutes is approximately 1/2 a minute (aka 30 seconds)
When we add 30 seconds to 5 minutes, 44 seconds, we get MORE than 6 minutes.

Answer: E

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Re: When running a mile during a recent track meet, Nuria was initially  [#permalink]

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New post 21 Jan 2018, 19:57
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Bunuel wrote:
When running a mile during a recent track meet, Nuria was initially credited with a final time of 5 minutes, 44 seconds. Shortly after her run, officials realized that the timing mechanism malfunctioned. The stopwatch did not begin timing her until 11/25 of a minute after she began to run. If the time was otherwise correct, how long did it actually take Nuria to run the mile?

A. 5 minutes, 17.6 seconds
B. 5 minutes, 21.8 seconds
C. 5 minutes, 43.56 seconds
D. 5 minutes, 44.44 seconds
E. 6 minutes, 10.4 seconds


11/25 minutes is 11/25 x 60 = 11/5 x 12 = 26.4 seconds

Thus, her actual time was 5 minutes 44 seconds + 26.4 seconds = 5 minutes 70.4 seconds = 6 minutes 10.4 seconds

Answer: E
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Re: When running a mile during a recent track meet, Nuria was initially  [#permalink]

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New post 15 Apr 2018, 04:55
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Bunuel wrote:
When running a mile during a recent track meet, Nuria was initially credited with a final time of 5 minutes, 44 seconds. Shortly after her run, officials realized that the timing mechanism malfunctioned. The stopwatch did not begin timing her until 11/25 of a minute after she began to run. If the time was otherwise correct, how long did it actually take Nuria to run the mile?

A. 5 minutes, 17.6 seconds
B. 5 minutes, 21.8 seconds
C. 5 minutes, 43.56 seconds
D. 5 minutes, 44.44 seconds
E. 6 minutes, 10.4 seconds


Time 1 = 5 min 44 secs

Delay = 11/25 * 60 secs

Delay = 132/5 secs

= 26.4 secs

Actual time = 5 : 44 + 0 : 26.4

= 6 : 10.4 secs

Hence(E)
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When running a mile during a recent track meet, Nuria was initially  [#permalink]

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New post 29 Aug 2018, 07:17
AkshdeepS wrote:
Bunuel wrote:
When running a mile during a recent track meet, Nuria was initially credited with a final time of 5 minutes, 44 seconds. Shortly after her run, officials realized that the timing mechanism malfunctioned. The stopwatch did not begin timing her until 11/25 of a minute after she began to run. If the time was otherwise correct, how long did it actually take Nuria to run the mile?

A. 5 minutes, 17.6 seconds
B. 5 minutes, 21.8 seconds
C. 5 minutes, 43.56 seconds
D. 5 minutes, 44.44 seconds
E. 6 minutes, 10.4 seconds


\(? = 5\min 44{\text{s}} + \frac{{11}}{{25}}\min\)

\(\frac{{11}}{{25}}\min \,\,\left( {\frac{{60{\text{s}}}}{{1\min }}} \right)\,\,\, = \,\,\,\frac{{11 \cdot 12}}{5}{\text{s}}\,\,\,\mathop = \limits^{\left( * \right)} \,\,\,26\frac{2}{5}{\text{s}}\)

\(\left( * \right)\,\,\,\frac{{\left( {10 + 1} \right) \cdot 12}}{5} = \underleftrightarrow {2 \cdot 12 + \frac{{12}}{5} = 24 + \frac{{10 + 2}}{5}} = 26\frac{2}{5}{\text{s}}\)

\(? = 5\min 44s + 16s + 10s + \frac{2}{5}s = 6\min 10.4\,{\text{s}}\)

POST-MORTEM: the alternative choices help you avoid the precise calculations above, BUT I think they are very instructive...

The above follows the notations and rationale taught in the GMATH method.
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Re: When running a mile during a recent track meet, Nuria was initially  [#permalink]

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New post 01 Dec 2018, 13:34
Hi All,

We're told that when running a mile during a recent track meet, Nuria was initially credited with a final time of 5 minutes, 44 seconds. Shortly after her run, officials realized that the timing mechanism malfunctioned. The stopwatch did not begin timing her until 11/25 of a MINUTE after she began to run. If the time was otherwise correct, how long did it actually take Nuria to run the mile? Based on the 'spread' of the answer choices, you can actually answer this question with almost no math at all; paying attention to the information that you're given - along with a little logic - can get you the correct answer rather quickly.

We know that Nuria was timed at 5 minutes 44 seconds, but the stop watch was NOT started until almost HALF OF A MINUTE had gone by. Thus, Nuria's actual time is greater than 5 minutes 44 second - almost HALF A MINUTE greater. There's only one answer that makes sense...

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Re: When running a mile during a recent track meet, Nuria was initially  [#permalink]

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New post 03 Jan 2019, 11:53
Hello,

You can get the answer in less than 20 seconds.

If the time didn't start right away, the total time should be 5Minutes 44 Second Plus Some time.. The answer should be > 5minutes 44 seconds..

When you look at the answer choices, there is only one answer that is more than 5M and 44S, which is E....
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Re: When running a mile during a recent track meet, Nuria was initially   [#permalink] 03 Jan 2019, 11:53
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