Breaking stress \(=\rho \times g \times L\)
Substitute values from the question
Breaking stress \(=7.5 \times 10^7 \,Nm ^{-2}\)
\(\left\{\begin{array}{l}\rho=\text { Density of material } \\ g=\text { Acceleration due to gravity } \\ L=\text { Length of wire that can hang without breaking }\end{array}\right\}\)
\(\rho=2.7 \times 10^3 \,kg m ^{-3}\)
\(g=9.8 \,m / s\)
\(7.5 \times 10^7=2.7 \times 10^3 \times 9.8 \times L\)
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