SOLUTION: if 7 typist is typing 7 hours in a day at equal take 9 days to type the manuscript of a book then in how many days will 3 typists working 3 hours in a day take to do the same job

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Question 1105550: if 7 typist is typing 7 hours in a day at equal take 9 days to type the manuscript of a book then in how many days will 3 typists working 3 hours in a day take to do the same job
Found 2 solutions by ikleyn, greenestamps:
Answer by ikleyn(52869)   (Show Source): You can put this solution on YOUR website!
.
if 7 typists typing 7 hours in a day at equal take 9 days to type the manuscript of a book,
then in how many days will 3 typists working 3 hours in a day take to do the same job ?
~~~~~~~~~~~~~~~~~ 

The "typist hours" are the same in both cases, which gives you an equation


7*7*9 = 3*3*days,


Solve it for "days".


Answer.  49 days.


Answer by greenestamps(13206)   (Show Source): You can put this solution on YOUR website!


There are many different ways to solve this kind of problem. The other tutor gave you a good solution by one of those methods.

Here is the method of solution that I find works best for me....

(1) 3 typists instead of 7 means the work will take 7/3 as long: 9 days times 7/3 = 21 days.
(2) The typists working only 3 hours a day instead of 7 means the work will take 7/3 times as long: 21 days times 7/3 = 49 days.

Or, without all the words....:
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