Hardness of a sample is found to be 400 mg/lit as CaCO3. A softener containing ion exchange resins was installed to reduce the hardness to 80 mg/lit as CaCO3 before supplying it to 6 households. Each household gets 400 lit/day. Then which of the following is/are true?
1
Efficiency of the softener is 80%
2
Efficiency of softener is 8%
3
If the efficiency of the softener is 100% flow that can be bypassed is 480 lit/day
4
If the efficiency of the softener is 100% flow that can be bypassed is 480 lit/hr