The photocopying rates of two machines M and N are as shown. Both machines were use to make a copy of a set of notes which had been divided into teacher set and student set. Machine M took 5 minutes is to photocopy teacher set and Machine N took 8 minutes to photocopy student set.
- How many pages were there altogether in the set of notes?
- Another copy of the same set of notes was made using Machine N only. How many minutes did Machine N take?