Rectangle:
Area = width x length
hence area = 4cm x 2.5cm
area = 10cm2
Circle:
Area = pi x radius2
Radius = 1/2 x diameter
Radius = 1.2cm
Area = 1.22 x 3.14
Area = 1.44 x 3.14
Area = 4.5216
Difference between areas =10cm2 - 4.5216cm2
= 5.4784cm2
2.dp = 5.48cm2