The length and breadth of a metal sheet are 3.124m and 3.002m respectively. The area of this sheet upto correct significant figure is

Options

A. `9.378 m^(2)`
B. `9.37 m^(2)`
C. `9.378248 m^(2)`
D. `9.3782 m^(2)`

Answer

A

Explanation

Significant figures is a method of expressing error in mesurment. Significant figures follow certain set of rules. That is any zeros that are between non-zeros are also considerd significant.
Also all non-zero digits are significant,
`:.` Length of metal `= 3.124m` has four significant figures.
Since, length and breadth have four significant figure therfore
Area `xx` length `xx` breadth
`=3.124xx3.002`
`=9.378248`
will also have significant figures.
Hence, area`= 9.378 m^(2)`