23:09 sir how you have used greater than and lesser than equal to sign.. cause in previous you have said that when it is saying 'between' then we don't have to include the consisting two numbers i mean the starting and ending number from which the limit is being projected off..we'll add it when it is saying from..
I came across your channel a couple of years ago... Then I didn't know that this channel's gonna play a huge part in my studies. Thanks loads, Manocha sir!!❤