Calculate grid frequency (lines per cm)?

Question

If the width of the lead strips are 0.05mm and the spacing is 0.25mm, how many lines per cm are there?

Answer 1

The "line" is the same as a "strip?"

Assuming that a lead strips is at the beginning, each pair of strips and space occupies 0.30mm

 

1cm / 0.3 mm

10 mm / 0.3 mm

3 1/3 times

 

There is enough room for a fourth strip.