9. The mechanical properties of the fiber and matrix are given in the graph. The interface strength in this composite is about 100 MPa, fiber diameter and length of the fibers are 0.5 mm and 20 mm, respectively. The amount of fiber is 30%. Calculate the strength of the composite. 0 c = 1,0,{1-2 ) + Su0 a = of.d 2-T MPa 2000 1800 1600 1400 1200 1000 800 600 400 200 0 0 20 Matrix 40 60 %