The material of a thin flat panel is changed from SAE 1010 steel panel (thickness ¼ 1.5 mm) an…

The material of a thin flat panel is changed from SAE 1010
steel panel (thickness ¼ 1.5 mm) an E-glass fiber-reinforced polyester SMC
panel with equal flexural stiffness. Calculate the percentage weight and cost
differences between the two panels. Note that the panel stiffness is  where E is the modulus
of the panel material, n is the Poisson’s ratio of the panel material, and h is
the panel thickness. The following is known for the two materials:

Suggest an alternative design approach by which the wall
thickness of the flat SMC panel can be reduced without lowering its flexural
stiffness.