Sorry, yes Pro, s should be 42.468476 but using that value still give d = 50.xxxxxx not the 1000 as expected? Many thanks Steve
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Actually, checking back now, I think there is an error somewhere. I'll get back to it in a while
Ok, no problem, I really do appreciate this, thank you
OK, with no factoring done, here is the correct solution $\displaystyle d=\dfrac{f(h+s)+\sqrt{f^2(h+s)^2-(2h+s)(sf^2-sh^2)}}{2h+s}$ All the best Pro
Woohooo!!!! Spot on!! fantastic. Thank you so much, this will be used many times every day and save me so much time in trial and error. Very clever indeed. Cheers Steve
Glad it helped Good luck
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