Question

describe the method of measuring the length and breadth of the playground using metre scale​

Answer 1

The ruler the simplest kind of length measurement tool: lengths are defined by printed marks or engravings on a stick. The meter was initially defined using a ruler before more accurate methods became available.

Gauge blocks are a common method for precise measurement or calibration of measurement tools.

For small or microscopic objects, microphotography where the length is calibrated using a graticule can be used. A graticule is a piece that has lines for precise lengths etched into it. Graticules may be fitted into the eyepiece or they may be used on the measurement plane.