水对容器底的压强为 P = ρg(L1+L2) = 1.0×10^3×10×(0.15+0.05) Pa = 2.0×10^3 Pa
容器的底面积为 S = L2² = 0.05² m² = 0.0025 m²
则水对容器底的压力为 F = PS = 2.0×10^3×0.0025 N = 5 N