A cantilever beam $($width$=120$ mm and height $200mm)$ has a length of $3\mathrm{.}0m$ and is carrying a $15-kN$ load at its

free end. The modulus of elasticity of the beam is $200$GPa. Calculate the deflection of the beam $($in mm$)$ at a

point $1m$ from the fixed end. Neglect the weight of the beam.

a$)1\mathrm{.}5625$

b$)3\mathrm{.}8475$

c$)2\mathrm{.}4612$

d$)4\mathrm{.}2616$