Let Ω be a multiply-connected domain in R n (n ≥ 2) of the form Ω = Ωout \Ωin. Set ΩD to be either Ωout or Ωin. For p ∈ (1, ∞), and q ∈ [1, p], let τ1,q(Ω) be the first eigenvalue ofUnder the assumption that ΩD is convex, we establish the following reverse Faber-Krahn inequality τ1,q(Ω) ≤ τ1,q(Ω ⋆ ), where Ω ⋆ = BR \Br is a concentric annular region in R n having the same Lebesgue measure as Ω and such that (i) (when ΩD = Ωout) W1(ΩD) = ωnR n−1 , and (Ω ⋆ )D = BR, (ii) (when ΩD = Ωin) Wn−1(ΩD) = ωnr, and (Ω ⋆ )D = Br. Here Wi(ΩD) is the i th quermassintegral of ΩD. We also establish Sz. Nagy's type inequalities for parallel sets of a convex domain in R n (n ≥ 3) for our proof.