Mathew Newton wrote:

Where did your 7.6m come from?

I'm not one for advocating overdoing things on a ladder however it
sounds to me like the 7.44m will be 'plenty' big enough....

My understanding (based on something I'd read on the net in the last
day or 2) is that a ladder should lean at a ratio of 1:4 (ie ground to
height). So to get 6.1 metres up you need to add roughly 25% to allow
for leaning, hence 7.6m

It's over 20 yrs since I did any geometry / trigonometry & I've got a
feeling that the paragraph above probably demonstrates that clearly...

Michael