Question

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

Answer 1

Answer:

answer is 160 cm it's so simple bro

Answer 2

The length of the wire required for a similar 20 by 20 grid is 840 cm

Step-by-step explanation:

There are 9, 1 cm ×  1 cm squares forming 3 × 3 grid

The length of wire required in 3 x 3 grid is

3(3+1) + 3(3+1)

= 3 × 4 + 3 × 4

= 24 cm

The length of the wire required in 20 by 20 grid

= 20(20+1) + 20(20+1)

= 20 × 21 + 20 × 21

= 420 + 420

= 840 cm

Hope this answer is helpful.

Know More:

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