Total area of the 64 small squares of aches board is 400cm2. There is 3cm wide

Question

Total area of the 64 small squares of aches board is 400cm2. There is 3cm wide border around the chess board. What is the length of each side of the chess board?

Options:

A . 17cm

B . 20cm

C . 23cm

D . 26cm

Answer: Option D

Length of each side of the chess board excluding path
=
Length of each side = (20+3+3)cm = 26cm

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