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. `9.37 m^(2)`
B. `9. 378 m^(2)`
C. `9.3782 m^(2)`
D. `9.378248 m^(2)`

Answer

B

Explanation

`l= 3.124m` (four significant figures), b= 3.002m (four significant figures)
`A= lb=3.124xx3.002`
`=9.378248`
From given data, least significant number is four, so the result of this multiplication must have four significant figures `A= 9.378 m^(2)`