arthurzheng1213
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Pierre cut the length of an 8 cm wide plank into nine pieces and arranged them as shown in the picture. The centrepiece is a square. How long was the original plank?

Pierre cut the length of an 8 cm wide plank into nine pieces and arranged them as shown in the picture The centrepiece is a square How long was the original pla class=

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temdan2001

Answer: 200cm

Step-by-step explanation:

The center Planck is a square of length 8cm.

The 4 next planks are of 16 cm each

And the next 4 Planks are of 32 cm each.

8 + 4(8×2) + 4(8×4)

8 + 4(16) + 4(32)

8 + 64 + 128

200 cm

Length of the original plank is 200cm

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