A heavy plank of mass 100 kg hangs on three vertical wires of equal length arranged symmetrically (see figure). All the wires have the same cross - section.
The middle wire is of steel and the other two are of copper . The modulus of elasticity of steel is assumed to be double that copper. Determine the tensions in the wire. (use `g=9.8ms^-2` )

Options

A. `T_(cu)=245N,T_("steel")=490N`
B. `T_(cu)=235N,T_("steel")=490N`
C. `T_(cu)=205N,T_("steel")=490N`
D. `T_(cu)=295N,T_("steel")=490N`

Answer

A