(1) (i) In the semi-arid and arid regions of Rajasthan, almost all the houses traditionally had underground tanks for storing drinking water.
(ii) The underground tanks can have dimensions 6.1 m deep, 4.27 m long, 2.44 m wide.
(2) Uses :
(i) We can use water in dry season.
(ii) It is useful to recharge the underground water.
(iii) It keeps the room cool.
