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

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.

Construct a word problem on quadratic equation, such that one of its answers is 20 ( years, rupee, centimetre , etc. ) Also solve it.

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