How much rainwater can be collected in a day from a 100 sq.m. rooftop? Enough for a family of four for at least 3 days

Experts say, by harvesting rainwater people can colect enough for a family of four for at least 3 day

How much rainwater can be collected in a day from a 100 sq.m. rooftop? Enough for a family of four for at least 3 days
Experts say, by harvesting rainwater people can colect enough for a family of four for at least 3 day