no stair lik structure found........
[9]
[9]
[9]

A capacitor is made of a flat plate of area A and a second plate having a stair-like structure as shown . The width of each stair is a and the height is b. Find the capacitance of the assembly.
ans:C=(ε0A/3)[(1/d)+(1/d+b)+(1/d+2b)]
where d is dist b/w 2 plates
solving u get the ans