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3 typists working together can type 36 pages in 30 minutes.

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Senior Manager
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3 typists working together can type 36 pages in 30 minutes. [#permalink] New post 07 Dec 2005, 06:29
3 typists working together can type 36 pages in 30 minutes. The ratio of the three typists are 4:3:2. How long will it take the slowest working alone to type 52 pages?
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 [#permalink] New post 07 Dec 2005, 06:31
Not sure what I'm doing wrong. I got 4:3:2 = 9

Divide 36 by 9 so you get 4 for each 1 in the ratio

(4:3:2) * 4 = 16:12:8

Not sure what to do after this. I know they want the slowest rate, which I think is 8. Do I need to convert this into an hour rate or something?
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 [#permalink] New post 07 Dec 2005, 06:44
desiguy wrote:
Not sure what I'm doing wrong. I got 4:3:2 = 9

Divide 36 by 9 so you get 4 for each 1 in the ratio

(4:3:2) * 4 = 16:12:8

Not sure what to do after this. I know they want the slowest rate, which I think is 8. Do I need to convert this into an hour rate or something?


so the slowest one can type 8 pages in 30 mins , to finish 52 pages he needs (52/8)*30 = 195 mins
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 [#permalink] New post 07 Dec 2005, 10:38
Yup thats the answer. I see it now. Thanks Laxieqv!
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 [#permalink] New post 07 Dec 2005, 12:14
z:x:y= 4:3:2

in 30 minutes, y will type 2/9*36=8 pages

in A minutes y will type 52: 8/30=52/A :arrow: 8A=1560 :arrow: A=195 minutes
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Re: Rate Questions [#permalink] New post 09 Jun 2008, 06:26
It's an easy one, i am really surprised every one got it wrong.

4:3:2 -> 4+3+2=9

in 30 min- 36 --> 72 in 1 hour.

the slowest one gets 2/9 *72 = 16 pages in one hour.

she will get 52 in 3.25 hours --> 52/16= 3.25
Re: Rate Questions   [#permalink] 09 Jun 2008, 06:26
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3 typists working together can type 36 pages in 30 minutes.

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