Square centimetre

The length of object measured to the nearest centimetre is 120 cm. If the length is expressed in mm, then the number of significant figures is

Verify that wave function (y=(2)/(x-3t)^(2)+1) is a solution to the linear wave equation, x and y are in centimetres.

A circle is inscribed in a square. An equilateral triangle of side 4sqrt(3) cm is inscribed in that circle. The length of the diagonal of the square (in centimetres) is

Express 5 centimetres in metres.

Which one is greater? 1 metre 40 centimetres + 60 centimetres or 2.6 metres.

Arrange the following lengths in their increasing magnitude: 1 metre, 1 centimetre, 1 kilometre, 1 millimetre.