I can not answer this fairly because I will and can catch pretty much any snake. If I really can not catch it I can make it leave area.
If I was faced with a snake that was decidedly dangerous and I could not catch it because it was unreachable, I would then look at where it is, if it was in a no alternate choice area, like someone's house, it would have to die.
If I could not catch it, but it was in a shed or lappa etc I would just try make it leave. Our lodge( 16 sheets of iron and some school black boards for walls) had a Cape Cobra move in under the air conditioning (about 16 pallets nailed together as flooring).
I just stuffed a few tins of smoldering old overalls and leaves in where I could and left it to work, the snake left and we slept there same night.
I removed a Cape Cobra from a lodge recently by simply spray it with water till it moved, once it was in the open I moved closer to it and it just kept moving away. I grabbed its tail once and let go straight away, it was then in full flight mode. Luckily for the guests, the river was like 20 m away and it headed straight for the water, once it had crossed the river it seemed the guests were happy that it was not coming back.
I suppose if you uninformed, fearful or had a bad experience things will differ for you.
I just hate people that go to the bush and then wish to kill the spiders and snakes they see, suppose in ones home and where loved ones are each must do as he can.