Question

I need help to solve this grid question

Answer 1

The answer is 9,600 cm of wire

Answer 2

20 x 20 grid = 1066.67 cm wire

Explanation:

Using unitary method

9 grid = 24 cm wire

1 grid =
`(24)/(9)` cm wire

Multiplying both sides by 400 (20 x 20)

400 grid =
`(24)/(9) * 400` cm

20 x 20 grid = 1066.67 cm wire