Question

Calculate area enclosed by a circle of diameter 1.06m to correct number of significant figures

Answer 1

0.88cm^2

A =π × r × r

d = 1.06cm ; r = 1.06/2 = 0.53

A = 22/7 × 0.530 × 0.530

A = 6.1798 / 7

A = 0.8828

A = 0.883 cm^2

Note :

1) 1.06 has 3 significant figures

2) rounded off to 3 digits