Question

A boy makes a ruler with graduations in cm on it, (i.e. 100 divisions in 1 m). To what accuracy  this  ruler can measure? How can this accuracy be increased?

Answer 1

Total length of the ruler = 1 m = 100 cm

No. of divisions = 100

Length of each division = `"Total length"/"total no. of divisions"`

 = 100 cm/100

 = 1 cm

Thus, this ruler can measure with an accuracy of 1 cm.

To increase the accuracy, the total number of divisions on the ruler must be increased.