Question

A cube has a side of length `1.2 xx 10^(-2)m`. Calculate its volume.
A. `1.7 xx 10^(-6) m^(3)`
B. `1.73 xx 10^(-6) m^(3)`
C. `1.70 xx 10^(-6) m^(3)`
D. `1.732 xx 10^(-6) m^(3)`

Answer 1

Correct Answer - A
`V = l^(3) = ( 1.2 xx 10^(-2) m)^(3) = 1.728 xx 10^(-6) m^(3) = 1.7 xx 10^(-6) m^(3)`
Hence , `l` has two significant figures . Thus , `V` will also have two significant figures.