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Sewage water is dropped in ocean after treating in

The density of population over 40 hectares is 250/hectare. If water supply demand per day is 200 litres and sewage discharge is 80% of water supply, the sewage flow in sewers of separate system, is

For treating the sewage of a large city, you will recommend

The width of a settling tank with 2 hour detention period for treating sewage 378 cu m per hour, is

The coagulant which is generally not used for treating the sewage, is

If the depletion of oxygen is found to be 2.5 mg/litre after incubating 2.5 ml of sewage diluted to 250 ml for 5 days at 20°C, B.O.D. of the sewage is

If the depletion of oxygen is found to be 5 ppm after incubating a 2.5% solution of sewage sample for 5 days at 21°C, B.O.D. of the sewage is

A dust packet is dropped from 9th storey of a multi-storeyed building. In the first second of its free fall another dust packet is dropped from 7th storey 15m below the 9th storey. If both packets rea

12 boys decided to constribute Rs. 750 each to an Orphange. Suddenly few of them boys dropped out and consequently the rest had to pay Rs. 150 more. Then the number of boys who dropped out

When an object is dropped, the number of feet N that it falls is given by the formula N=1/2gt2 where t is the time in seconds from the time it was dropped and g is 32.2. If it takes 5 seconds for the

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