$($b$)$ If the polymeric plasticizer is replaced by nitrile rubber to make the same raincoat, the mass $\%$ of rubber to be blended with PVC is

$($c$)$ A continuous and aligned glass fiber reinforced composite has a modulus of elasticity of $150$ GPa in the longitudinal direction. The matrix is a polyester resin with a modulus of $4\mathrm{.}5$ GPa $.$ The glass fiber has a modulus of $340$ GPa $.$

i$)$ What is the volume fraction of the glass fiber?

ii$)$ If the cross sectional area of the composite is $300m{m}^2$ and a stress of $100$ MPa is applied in the longitudinal direction, what will be the total load $($in kN$)$ carried by the glass fibers?

$2+3+(2*5+2*5)$