A cylinder has a radius of 0.80 m. How much work is done by a gas in the cylinder if the gas exerts a constant pressure of 3.8 x 10^5 Pa on the piston, moving it a distance of 0.20 m?

Determine the change in width a, height b, thickness t when a plate is subjected to the uniform distributed load and is made of material having modulus of elasticity e=230 gpa and poisson's ratio ν=1/3. given : a=400 mm and b= 300 mm also the uniformly distributed load in downward y direction of plate is 2 mn/m and in the positive x direction is 3 mn/m and t=20 mm