A water softener has 0.05 m3 of ion exchange resin with an ion exchange capacity of 40 kg/m3.The water requirement of users is 1000 litres per day. If the water contains 230 mg/l of hardness as CaCO3 and users want to soften it to 100 mg/l as CaCO3, How much water should bypass the softener daily? (in l/day)
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