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For what duration did Antony speak in a meeting?

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For what duration did Antony speak in a meeting? [#permalink]

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New post 07 Aug 2017, 19:26
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For what duration did Antony speak in a meeting?

(1) He spoke an average of 55 words per minute.

(2) He would have spoken for 12 more minutes had his speaking rate been 4 words less per minute.

Source- Aristotle.
[Reveal] Spoiler: OA

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Re: For what duration did Antony speak in a meeting? [#permalink]

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New post 07 Aug 2017, 20:57
1. He spoke an average of 55 words per minute.
Knowing his speed of speaking, we cannot give the exact timing that Antony spoke for.
Hence, insufficient.

2. He would have spoken for 12 more minutes had his speaking rate been 4 words less per minute.
If he had spoken for 12 minutes more, the speaking rate would be 4 words less per minute
But not knowing his exact speed, we cannot clearly tell how much time Antony spoke for. Hence, insufficient

However on combining the information from both the statements,
If Antony's speed is 55 words/minute, he would speak 55x words in x minutes
From the second statement,
we can say that if he spoke for x-12 minutes, he would speak 4 words less/minute or 51 words/minute.

Using this equation 55x = 51(x-12) we can find x(the time spoken by Antony)(Option C)
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Re: For what duration did Antony speak in a meeting?   [#permalink] 07 Aug 2017, 20:57
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