星空传媒

To make sure I checked with my 17-year old son who, although studying maths at A-Level, has never looked at a calculation of this sort. He also got it right in seconds without any prompting from his dad.

How embarrassing for the 鈥渆xperienced鈥� professionals and other 4.90 鈥榚rs who made the fundamental error of thinking that the pitch of the hip rafter is also 30 degrees 鈥� whereas it is actually 22.2 degrees.

R E Wilson MCIOB 鈥� Senior Project Surveyor