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The area of each square of a chessboard ...

The area of each square of a chessboard having 64 squares is `4 cm^2`. If there is a border on all the sides of the chessboard of 2 cm, then the perimeter of the chessboard is:
64 वर्गों वाले एक शतरंज की बिसात के प्रत्येक वर्ग का क्षेत्रफल 4 वर्ग सेमी है | यदि इस बिसात की सभी भुजाओं पर 2 सेमी का किनारा है , तो इस शतरंज की बिसात का परिमाप ज्ञात करें |

A

128 cm

B

80 cm

C

70 cm

D

256 cm

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