answer q4 only

Problem 3: A reinforced plastic sheet is to be made from a matrix with a tensile strength of 27 MN/m (at the fiber's fracture) and continuous glass fibers with a modulus of 165 GN/m. If the resin ratio by volume is 57% and its modulus is 1.6 GN/m, estimate the tensile strength and modulus of the composite. Problem 4: If the matrix in Problem 3 was reinforced with the same volume fraction of glass but in the form of randomly oriented glass fibers rather than continuous filaments, what would be the tensile strength of the composite? The fibers are 0.8 mm long, have an aspect ratio of 75 and produce a reinforcement efficiency of 0.18. The fiber strength is 2.45 GN/m and the shear strength of the interface is 6.3 MN/m