Practice question

h = 2Scos⁡θρga. S = 0.0227N/m, ρ = 806kg/m3, g = 10m/s2, a = 0.35×10−3m. h = 2×0.0227×1806×10×0.35×10−3 = 0.0161m = 1.61cm. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 1.6 cm. This satisfies dimensional consistency and physical conditions given, so option B is scientifically correct.