What is the length of the longest line that can be drawn in a 20x12x9 box?
Please explain your working?
Let Three sides of box are a=9 b=12 c=20
d is hypotenuse of sides b & c d^2=b^2+c^2 d^2=(12)^2+(20)^2 d=sqrt of 544
e is the hypotenuse of sides a and d e^2=d^2+a^2 e^2=[sqrt of 544]^2+(9^2) e^2=544+81=625 e=25 longest line to be drawn of length 25
