ပုစၥာေလးက ဒီလုိပါတဲ့

Circular tank = 5d2(2=square)h (Gallon) i.e

Circular tank = 5 (dxd)h  unit က Gallon နဲ႔ ထြက္ပါမယ္

အထက္ပါ ပုံေသနည္းေလးကုိ သုံးၿပီးေတာ့ ေအာက္ပါ ပုစၥာေလးကုိ တြက္ၾကည့္ေပးေစလုိပါတယ္။

A family of 10 members uses 10 gallons of rain water / person/ day from their rain water tank having separator.

 (i) calculate the rain water catchmant area if the rain water average is 36.5 in/year.

(ii) Calculate the depth of storage tank for 3 months use if the diameter is 10 ft.

(iii)  Calculate the amount of bleaching powder to disinfect water in the tank in question(ii).