Number Of Curtains
A cloth cutting machine makes 9 cuts on a one meter long cloth in 20 seconds. Each piece of cloth is used to make curtains. At time 0 the machine starts working, at 40 seconds how many pieces of cloth are ready to be turned into curtains?
Details and Assumptions :
- No time is wasted in keeping a new cloth onto the machine. it is kept in a moment.
The answer is 20.
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