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getzgetzu
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N and K work together for a work. Firstly, N and K worked 05 May 2006, 23:27
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N and K work together for a work. Firstly, N and K worked together for 1.6 hour and had finished 2/3 of the work. Then working alone, K finished the work in 2 hours. How long time will it take for N to finish 1/3 of the work?



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Professor
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N and K work together for a work. Firstly, N and K worked 17 May 2006, 18:52
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getzgetzu
N and K work together for a work. Firstly, N and K worked together for 1.6 hour and had finished 2/3 of the work. Then working alone, K finished the work in 2 hours. How long time will it take for N to finish 1/3 of the work?
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4/3 hours (if no calculation mistake. will correct, if any)
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gmatmba
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N and K work together for a work. Firstly, N and K worked 17 May 2006, 20:45
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yeah 4/3 hrs seem to be correct.
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kapslock
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N and K work together for a work. Firstly, N and K worked 18 May 2006, 01:00
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getzgetzu
N and K work together for a work. Firstly, N and K worked together for 1.6 hour and had finished 2/3 of the work. Then working alone, K finished the work in 2 hours. How long time will it take for N to finish 1/3 of the work?
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1.6 hrs is 2/3 work => total work is done in 2.4 hours by N and K.
K finished 1/3 work in 2 hours, thus K's rate = 1/6.
1/6 + 1/N = 1/2.4 = 5/12 = 2/12 + 1/N => 1/N = 3/12=1/4.
Therefore N takes 4/3 hours to finish 1/3rd work.

Prof, if you did all this calculation in your head, hats off man, you're a genius.
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remgeo
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N and K work together for a work. Firstly, N and K worked 18 May 2006, 02:45
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Agree with 4/3 hrs.
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Professor
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N and K work together for a work. Firstly, N and K worked 18 May 2006, 05:31
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getzgetzu
N and K work together for a work. Firstly, N and K worked together for 1.6 hour and had finished 2/3 of the work. Then working alone, K finished the work in 2 hours. How long time will it take for N to finish 1/3 of the work?
1.6 hrs is 2/3 work => total work is done in 2.4 hours by N and K.
K finished 1/3 work in 2 hours, thus K's rate = 1/6.
1/6 + 1/N = 1/2.4 = 5/12 = 2/12 + 1/N => 1/N = 3/12=1/4.
Therefore N takes 4/3 hours to finish 1/3rd work.

Prof, if you did all this calculation in your head, hats off man, you're a genius.
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you completely deserve that for your math skills... :good

normally i do so that is why i do lots of mistakes. however it was not the same with this one. few years ago, i used to do even the difficult calculations in my head. i am not the same as i was and i guess it applies to all of us. right?

there was a simple problem of finding the diatance between a and b. it was sqrt (100+576) or sqrt(676). what i did is the following:

676 = 2x2x2x3x3x3x3 = 18 sqrt(2)

and the result: alooo (alooo=potato. we say potato or aloo for 0. nowadays aloo is replaced by laloooooo therefore it is also said laloooo :wink: ).
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shampoo
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N and K work together for a work. Firstly, N and K worked 18 May 2006, 06:24
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4/3 aswell, but my timing is pathatic
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positive soul
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N and K work together for a work. Firstly, N and K worked 18 May 2006, 08:31
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I took me a long time as well because I try to work with the fractions (1/3,2/3) instead of converting the time to one job.



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