For A (square) The area of the square s=a2Δs=dads​×Δa=2a×ΔasΔs​=a22a×Δa​aΔa​=2×0.4A=0.8 For B( sphere ) The volume of the sphere is given by V=34​πr3ΔV=drdV​×Δr=4πr2×ΔrVΔV​=3rΔr​=3×0.3B=0.9 For C (Cylinder) The total surface area of the cylinder is S′=2πrh+2πr2=4πh2ΔS′=dhdS′​×ΔhΔS′=8πh×ΔhS′ΔS′​=h2​×ΔhhΔh​=2×0.2=0.4 For D. y=x2+x−3ΔxΔy​=2x+1Δy=(2x+1)ΔxΔy=(2×2+1)×0.1=0.5C<D<A<B