The demand of water is 150 litres/head/day in a city of one lakh population. The factor of safety is taken as 1.5, detention time as4 h and overflow rate as 20,000 litres/day/m2. The area of 3 m deep plain sedimentation tank as per surface loading consideration will be
1
1025 m2
2
1075 m2
3
1125 m2
4
1175 m2