A 5m wide retaining wall made of concrete with density of 2500 kg/m is filled with water having density of 1000 kg/m on one side.Determine the height of filling up to which wall is safe against overturning when the water is filled upto maximum height of retaining wall the location of the retaining wall is 77 deg 36 min E and 38 deg 42 min E note the accleration due to gravity changes with the latitude.