00:01
Hi, there is a question in this, there is a oil spill.
00:04
So let us say, this is oil spill in the circular form.
00:12
And there is a helicopter which is above this center.
00:15
So i cannot just show it is above the center.
00:19
So i will be just showing like this.
00:22
And this is perpendicular to the center.
00:24
Remember, this is perpendicular to the center.
00:26
So if we could just draw this point, so this would become radius, so this has to be 90 degree.
00:35
It is just like a, this is just like a pole that is standing at point o.
00:45
So this must be 90 degree...