Question No$\mathrm{.}15$: A $70$ mm long block has cross section of $50$mmx$10$ mm$.$ The block is subjected to forces $60$ KN $($tensile$)$ on $(50$ mmx$10$ mm$)$ mm face and $110$ KN $($compressive$)$ on the $70$ mm x$10$ mm face. Determine the force to be applied on $70$ mm x $50$ mm face such that there is no change in volume of the block. Take E$=200$ GPa & Poisson$$s ratio as $0\mathrm{.}3.$