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In which kind of cities are combined systems used?

In which kind of cities are combined systems used? Correct Answer Less population

If a city has less population, it consists of fewer residences and industries based on the city needs. Hence the quantity of sanitary sewage produced will also be less. It becomes uneconomical to lay separate sewers for both stormwater and sanitary sewage. Hence combined systems are preferred.

Related Questions

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S1: Urban problem differ from State to State and city to city.
P: Most of the cities have neither water nor the required pipelines.
Q: The population in these cities has grown beyond the planners imagination.
R: However, certain basic problems are common to all cities.
S: Only broad macro - planning done for such cities, without envisaging the future growth, and this has failed to meet the requirements.
S6: There is no underground drainage system in most cities, and the narrow historical roads are already congested.

The Proper sequence should be:
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