If pressure at half the depth of a lake is equal to ⅔ pressure at the bottom of the lake then what is the depth of the lake?

Pressure at half the depth = Po+h2dgPressure at the bottom = P0+hρgAccording to given conditionPo+h2dg = 23(P0+hdg)⇒ 3P0+3h2dg = 2Po+2hdg⇒  h = 2Podg = 2×105103×10 = 20 m