Manager
Joined: 01 Jan 2020
Posts: 114
Concentration: Marketing
Schools: Copenhagen Business School - Class of 2022
Re: A certain form letter is to be sent to prospective customer
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25 Apr 2020, 08:27
The beauty of these sort of exercises is that they don't have to be done with formulas.
My approach:
machines.........letter..........minutes
4.....................4................4
now with the given, we have to establish that there is always an inverse with machines and minutes, wish we not touch the letters for the time being.
Meaning if there are more minutes, there will consequently be less machines, which will reflect itself in such a way that it would take LONGER to make 4 letters.
For instance we want to see how many machines we will have if it takes 8 minutes to make 4 letters. We multiply minutes and we divide machines.
Yielding back:
machines.........letter..........minutes
2.....................4................8
Now in our case we are interested to see how how long it would take 100 machines to make 100 letters.
We set up our equation
machines.........letter..........minutes
4.....................4................4
Following this we start off with how long it would take 100 machines to make 4 letter.-->25*4 (machines) and 4min/25 (min)
machines.........letter..........minute
100.....................4................0,16
Now we come back to the letters.
Letters and minutes have a direct relationship, yet such that only when we increase (or decrease) the letters do the minutes change. I prefer to look at it from a non-reciprocal point of view due to simplicity, meaning if we change minutes, we play around with machines instead of letters.
Now we multiply 4*25=100 letter and 0,16min*25= 4min
AND we get:
machines.........letter..........minute
100.....................100................4
Now this system works for me marvellously, I usually manage to solve these exercises in about 30-45 sec.
On top of everything, for me it always works best when I can draw a picture, just easier than using formulas.
CHeers!