1.

A cube has a side of length `1.2xx10^(-2)m`. Calculate its volumeA. `1.7xx10^(-6)m^(3)`B. `1.73xx10^(-6)m^(3)`C. `1.78xx10^(-6)m^(3)`D. `1.732xx10^(-6)m^(3)`

Answer» Correct Answer - A
Here,
Length of the cube, `L=1.2xx10^(-2)m`
Volume of the cube, `V=(1.2xx10^(-2)m)^(3)=1.728xx10^(-6)m^(3)`
As the result can have only two significant fiures, therefore, on rounding off, we get `V=1.7xx10^(-6)m^(3)`


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