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In a dot matrix printer the time to print a character is $6$ m.sec., time to space in between characters is $2$ m.sec., and the number of characters in a line are $200$. The printing speed of the dot matrix printer in characters per second and the time to print a character line are given by which of the following options ?

1. $125$ chars/second and $0.8$ seconds
2. $250$ chars/second and $0.6$ seconds
3. $166$ chars/second and $0.8$ seconds
4. $250$ chars/second and $0.4$ seconds
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## 1 Answer

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total characters =200  each character having one space

total time to print 200 chars=200x6 =1200 ms

total time to space in =200x2=400 ms

200 charactes total print time =1600 ms =1.6 sec

The printing speed of the dot matrix printer in characters per second
=200/1.6 =125 character per sec

line will take 1.6 sec

Hence all options are incorrect. Marks to All given in exam.
by Boss (48.2k points)
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