Answer Posted / m ghailani

15000 ltr.= 15 m3 (1 m3 =1000 ltr.)

For tank height = 1m +0.1m (free board)=1.1m
Area needed = 15m3/ 1m= 15m2

For tank height = 2m +0.1m (free board)=2.1m
Area needed = 15m3/ 2m= 7.5m2

similarly we can find the area for any depth.
note:Free board is the space to be left above water
(between water surface and tank cover), it is usually taken
as 10cm (0.1m).

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