Practice question

P = Pa+ρgh. Pa = 1.01×105Pa, ρ = 1.03×103kg/m3, g = 9.8m/s2, h = 800m. P = 1.01×105+1.03×103×9.8×800 = 1.01×105+8.0784×106 = 8.1794×106Pa. As per NCERT, applying relevant law/formula with correct units and sign convention leads to 8.18 × 10⁶ Pa. This satisfies dimensional consistency and physical conditions given, so option C is scientifically correct.