Significant Figures in Calculations-2

Which of the following rules regarding the significant figures and calculations involving them is not correct?

(a). Calculate the area enclosed by a circle of radius 0.56 m to the correct number of significant figures. (b) . Calculate the area enclosed by a circle of diameter 1.12 m to the correct number of significant figures.

Significant Figures In Addition & Substraction|Significant Figures In Multiplication & Division|Remembering Technique

Recap|Significant Figures|Rounding Off|Rules For Rounding Off|Significant Figures In Addition And Subtraction|Significant Figures In Multiplication And Division|Important Points|Summary

The number of significant figures in 3400 is

Significants Figures|Rules For Counting Significant Figures|Rounding Off|Remembering Technique

The number of significant figures in 45056 is

Significant figures in 0.00051 are