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How is the rooftop rainwater filtered?

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a

Using sand and bricks

b

Using electric filter

c

Using a net system

d

Using modern silters

answer is A.

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Detailed Solution

The rooftop rainwater is filtered Using sand and bricks. People in ancient times used their knowledge of soil types and rainfall regimes to develop wide-ranging techniques to harvest rainwater, groundwater and river water. In rooftop rainwater harvesting, rainwater from the rooftops of the houses is collected using a PVC pipe which is then filtered with the help of sand and bricks. This filtered water is then taken to the sump via an underground pipe for immediate usage, and the excess water is taken to the well.

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