What are the mis-concepts during the period of menstruction?

Is it apt to believe in the myth of keeping away women untouchable during the period of menstrual cycle ?

In what way are junk foods harmful to us ?

In what way this kind of water supply is useful to the crop as well as the farmer?

What are the different states in which water in found during the water cycle?

The minimum temperature of the day is measured during what time period of the day?

What is true for "lactational amenorrhoea" ? i) It means absence of menstruation ii) Ovulation does not occur during the lactational period iii) Chances of contraception are almost nil upto six months following parturition iv) Side effects are almost nil v) Contraceptive efficiency reduces after the period of intense lactation vi) It is a natural method of contraception

Two towns A and B are connected by a regular bus service with a bus leaving in either direction every T minutes. A man cycling with a speed of 20 km h^(-1) in the direction A to B notices that a bus goes past him every 18 min in the direction of his motion and every 6 min in the opposite direction. What is the period of T of the bus service and with what speed (assumed constant) do the buses ply on the road ?

Two towns A and B are connected by a regular bus service with a bus leaving in either direction every T minutes. A man cycling with a speed of 20 km h^(-1) in the direction A to B notices that a bus goes past him every 18 min in the direction of his motion, and every 6 min in the opposite direction. What is the period T of the bus service and with what speed (assumed constant) do the buses ply on the road ?