Question

a chess board comprises of 64 squares each of area 4 cm find the area and perimeter of the chess board if there is border of 2 cm all around it

Answer 1

if area of each square=4cm square
then side=2cm
no of squares in a row=8
so the width=8*2=16cm
there's a border of 2cm,so the side of board will be 16+2+2(2cm added on both sides)
so side of chess board=20cm
area=S^2=20cm^2=400 square cm
perimeter=4S=4cm*20=80cm

hope this helps you

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Answer 2

perimeter = 80 cm

HOPE IT HELPS YOU