New margin rule

I did not understand new margin rules from 1 Aug 2020.
kindly explain??
1.Suppose i have 100 rs in my demat account now to buy a share of rs 100 how much margin i have to maintain??
2. and after buying that share suppose its value becomes 110 rs. the same day.
do i need to maintain 110 rs. again to sell it.

Minimum 20%, that will be Rs. 20.

You don’t need any margin to square-off your intraday position.

Also, new rules will come into effect on September 1st, until then things will continue as they were before.