Question

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

Answer 1

Answer:

840cms

Step-by-step explanation:

A 20 by 20 grid used 21 lines of 20 cm in vertical and horizontal dimensions.

So,

Answer = (21 + 21)20 = 42(20) = 840cms

Answer 2

Answer: 840cm of wire is required.

Step-by-step explanation:

The grid will have 20+1 horizontal abd 20+ 1 vertical lines so the 21+21 = 42

42×20 = 840 cm

so 840cm wire will be required to create 20 ×20 grid.