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An actor read alound and recorded a certain 420-page book on

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An actor read alound and recorded a certain 420-page book on [#permalink] New post 16 Jan 2013, 08:33
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An actor read alound and recorded a certain 420-page book on several audiotapes. Was the average recording time per page less than 90 seconds?

(1) Each tape was at most 40 minutes
(2) The book was recorded on 15 tapes
[Reveal] Spoiler: OA

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Re: An actor read alound and recorded a certain 420-page book on [#permalink] New post 16 Jan 2013, 09:39
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Consider T as total time taken to record 420 page book. Average time 90 secs = 1.5 mins.
So question asks is total time T < 420*1.5 i.e. T<630?

1) Each tape was at most 40 minutes
INSUFFICIENT: We dont know how many tapes were recorded
2) The book was recorded on 15 tapes
INSUFFICIENT: We dont know how long each of those 15 takes took for recording

Combining (1) and (2) --We need to prove T<630?
SUFFICIENT: Tape (out of 15 tapes) spent at the most 40 mins (i.e. less than or equal to 40)
Maximum time that could have spent on recording = 15 * 40 = 600 (which is still less than 630)

Hence choice(C) is the answer.
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Re: An actor read alound and recorded a certain 420-page book on [#permalink] New post 17 Jan 2013, 01:23
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fozzzy wrote:
An actor read alound and recorded a certain 420-page book on several audiotapes. Was the average recording time per page less than 90 seconds?

1) Each tape was at most 40 minutes
2) The book was recorded on 15 tapes

Please provide detailed explanations! Thanks!

The question asks us... Is Total time spent < 420*3/2 min. => Is Total time spent < 630 min.?

Statement 1

Insufficient, as there is no information given on # of tapes.

Statement 2

Insufficient, as there is no information given on lenght of tapes.

Combined together

Total length of Tapes < 40*15 (600 min.)

So Total time spent < 600 min.. Answer C.

Hope this is clear now. :)

-Shalabh Jain
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Re: An actor read alound and recorded a certain 420-page book on [#permalink] New post 05 May 2013, 19:28
fozzzy wrote:
An actor read alound and recorded a certain 420-page book on several audiotapes. Was the average recording time per page less than 90 seconds?

1) Each tape was at most 40 minutes
2) The book was recorded on 15 tapes

Please provide detailed explanations! Thanks!


1) Insufficient by itself. 40 minutes/1.5 minutes = 26.67, so 26.67 or more pages per tape needed to satisfy the question.
2) Insufficient by itself. 420 pages/15 tapes = 28 pages/tape

1 + 2 28 pages/tape > 26.67 pages/tape
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Re: An actor read alound and recorded a certain 420-page book on [#permalink] New post 30 Jul 2013, 15:00
An actor read aloud and recorded a certain 420-page book on several audiotapes. Was the average recording time per page less than 90 seconds?

Was the total time less than 630 minutes?

(1) Each tape was at most 40 minutes
INSUFFICIENT

(2) The book was recorded on 15 tapes
INSUFFICIENT

1+2)

The total amount of minutes on the audiotapes could be at most, 15*40=600 minutes which answers our question "Was the total time less than 630 minutes?"
SUFFICIENT

(C)
Re: An actor read alound and recorded a certain 420-page book on   [#permalink] 30 Jul 2013, 15:00
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