Radius of circle = 2 cm and side of aluminium square sheet = 6 cm According to question,
Area of aluminium sheet left = Total area of aluminium sheet – Area of circle
= side x side - πr 2
= 6 x 6 – 22/7 x 2 x 2
= 36 – 12.56
= 23.44 cm2
Therefore, the area of aluminium sheet left is 23.44 cm2.