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On Thursday afternoon, two machines, J and R, ran continuously at unif

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On Thursday afternoon, two machines, J and R, ran continuously at unif  [#permalink]

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New post 18 Apr 2017, 03:49
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On Thursday afternoon, two machines, J and R, ran continuously at uniform rates to fill a production order. At what time did they completely fill the order?

(1) If machine C were added, the three machines would fill the order in 4 minutes.
(2) Machine C fills 2 orders per hour.

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Re: On Thursday afternoon, two machines, J and R, ran continuously at unif  [#permalink]

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New post 18 Apr 2017, 18:56
Bunuel wrote:
On Thursday afternoon, two machines, J and R, ran continuously at uniform rates to fill a production order. At what time did they completely fill the order?

(1) If machine C were added, the three machines would fill the order in 4 minutes.
(2) Machine C fills 2 orders per hour.



no info on number of orders & time they started working together

all insuff

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Re: On Thursday afternoon, two machines, J and R, ran continuously at unif  [#permalink]

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New post 18 Apr 2017, 22:04
stat 1: together they require 4 mins... rate of c cannot be calculated
not suff

stat 2: no relation to J and R

both combined rate of J and R can be calculated.. but total number of orders not given..

not suff
ans E
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Re: On Thursday afternoon, two machines, J and R, ran continuously at unif  [#permalink]

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New post 04 Mar 2018, 04:45
Bunuel wrote:
On Thursday afternoon, two machines, J and R, ran continuously at uniform rates to fill a production order. At what time did they completely fill the order?

(1) If machine C were added, the three machines would fill the order in 4 minutes.
(2) Machine C fills 2 orders per hour.


Hi Bunuel.
If the question had only asked the time required for J and R together to fill the order, then choice C would have been sufficient ?
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Re: On Thursday afternoon, two machines, J and R, ran continuously at unif  [#permalink]

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New post 05 Mar 2018, 23:02
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sandysilva wrote:
Bunuel wrote:
On Thursday afternoon, two machines, J and R, ran continuously at uniform rates to fill a production order. At what time did they completely fill the order?

(1) If machine C were added, the three machines would fill the order in 4 minutes.
(2) Machine C fills 2 orders per hour.


Hi Bunuel.
If the question had only asked the time required for J and R together to fill the order, then choice C would have been sufficient ?


Hello

Yes i think if the question had asked time required for J/R together to fill one order, answer would have been C.

Machine C fills 2 orders in 60 minutes, or 1/30 orders in one minute or 2/15 orders in 4 minutes. But since J, R, C together fill one complete order in 4 minutes, J & R complete (1 - 2/15) = 13/15 orders in 4 minutes. This should be able to give us the required time.
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Re: On Thursday afternoon, two machines, J and R, ran continuously at unif  [#permalink]

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New post 06 Mar 2018, 00:04
Hi Brunel, Aman.. if I follow correctly, 13/15 orders completed by j and r together in 4 mins. So, 13/60 orders completed by them in 1 min. Hence, 1 order will be completed in 60/30, that is 4.6 minutes. Please correct me if wrong.


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Re: On Thursday afternoon, two machines, J and R, ran continuously at unif  [#permalink]

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New post 06 Mar 2018, 01:12
monishap88 wrote:
Hi Brunel, Aman.. if I follow correctly, 13/15 orders completed by j and r together in 4 mins. So, 13/60 orders completed by them in 1 min. Hence, 1 order will be completed in 60/30, that is 4.6 minutes. Please correct me if wrong.


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Hello

Yes, I think that's correct. In 1 minute, 13/60 orders. So 1 order in 60/13 minutes or 4 8/13 minutes or 4.6 minutes
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On Thursday afternoon, two machines, J and R, ran continuously at unif  [#permalink]

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New post 12 Mar 2018, 10:11
amanvermagmat wrote:
sandysilva wrote:
Bunuel wrote:
On Thursday afternoon, two machines, J and R, ran continuously at uniform rates to fill a production order. At what time did they completely fill the order?

(1) If machine C were added, the three machines would fill the order in 4 minutes.
(2) Machine C fills 2 orders per hour.


Hi Bunuel.
If the question had only asked the time required for J and R together to fill the order, then choice C would have been sufficient ?


Hello

Yes i think if the question had asked time required for J/R together to fill one order, answer would have been C.

Machine C fills 2 orders in 60 minutes, or 1/30 orders in one minute or 2/15 orders in 4 minutes. But since J, R, C together fill one complete order in 4 minutes, J & R complete (1 - 2/15) = 13/15 orders in 4 minutes. This should be able to give us the required time.


Aman. I think the no. of orders is not mentioned in the question. So we cannot really take "J, R, C together fill one complete order"
Correct me if i am wrong.
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Re: On Thursday afternoon, two machines, J and R, ran continuously at unif  [#permalink]

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New post 12 Mar 2018, 10:49
itisSheldon wrote:
amanvermagmat wrote:

Hello

Yes i think if the question had asked time required for J/R together to fill one order, answer would have been C.

Machine C fills 2 orders in 60 minutes, or 1/30 orders in one minute or 2/15 orders in 4 minutes. But since J, R, C together fill one complete order in 4 minutes, J & R complete (1 - 2/15) = 13/15 orders in 4 minutes. This should be able to give us the required time.


Aman. I think the no. of orders is not mentioned in the question. So we cannot really take "J, R, C together fill one complete order"
Correct me if i am wrong.


Hello itisSheldon

While replying to Sandy, I assumed that 'fill the order' means 'fill one order'. I personally think that when a question doesn't specify such things, then 'filling the order' would mean 'filling one order' only. Nowhere in the question was it mentioned that the word 'order' could mean 'a batch or orders' or 'a series or orders' or 'multiple orders'.

That was the basis of my comment above. But I could be wrong who knows :)
Re: On Thursday afternoon, two machines, J and R, ran continuously at unif &nbs [#permalink] 12 Mar 2018, 10:49
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