Robin
Well-known member
I don't know about you but I find multiplyng by 1.5 in my head rather easier than by 1.34, and the difference so slight it hardly matters.
Hence the use of the word "approximately" in describing a rule of thumb where two decimal points of accuracy is frankly pointless.
Agreed but since I need a calculator anyway to do the square root bit, it is just as easy to multiply by 1.34 on that as by 1.5, sorry pedantic not intended.