The 3 by 3 grid below shows nine 1 cm * 1 cm 1 cm*1 cm squares and uses 24 cm 24 cm of wire. What length of wire is required for a similar 20 by 20 grid?

Length of wire is required = 840 cm

Step-by-step explanation:

Given:

20 by 20 grid

Find:

Length of wire is required.

Computation:

We know that 20-20 grid required 21 lines.

20 cm vertical and horizontal.

⇒ Length of wire is required = (21 + 21) 20 cm

⇒ Length of wire is required = (42) 20 cm

⇒ Length of wire is required = 840 cm