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PS- clocks

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Manager
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PS- clocks [#permalink]

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New post 08 Jan 2009, 11:27
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How much does a watch loses per day, if it's hands coincide every 64 minutes?

32 8/11 min
36 5/11 min
90 min
96 min

pls show working also
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Re: PS- clocks [#permalink]

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New post 08 Jan 2009, 12:08
ALD wrote:
How much does a watch loses per day, if it's hands coincide every 64 minutes?

32 8/11 min
36 5/11 min
90 min
96 min

pls show working also


= (4/64)(24x60)
= 90 min
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Re: PS- clocks [#permalink]

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New post 09 Jan 2009, 00:41
what formula did you use..

(4/64)(24*60)

what is it
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Re: PS- clocks [#permalink]

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New post 09 Jan 2009, 01:01
4/64 gives the fraction of wastage time for any given period of interval. --- 1

The total period of interval under consideration is 24*60 minutes. ---- 2

We have to multiply 1 and 2 to get fraction of delayed time .
Re: PS- clocks   [#permalink] 09 Jan 2009, 01:01
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