The moisture content of sludge is reduced from 90% to 80% in a sludge digestion tank. The percentage decrease in the volume of sludge, is________?

When a body slides down an inclined surface, the acceleration of the body is given by________?

The useful storage is the volume of water stored in the reservoir between________?

Before discharging the foul sewage into rivers, it is generally treated by________?

Select the incorrect statement?

The method of analysis of distribution system in which the domestic supply is neglected and fire demand is considered is________?