Quote:
Originally Posted by victor
15ft :)

Well Victor, the others were right including Wacky with his lateral thinking.
Retina gave a tricky conversion from sq. ft to sq. metres.
Mr. P1 and OT were on the dot too.
To be honest I was bowled over too !
You see, you cannot compare linear feet with square feet.
One has to square the linear feet into square feet.
Thus 10^2 = 100 sq.ft.
15^2 =225 sq.ft.
Then set up the proportion
10 : 100 = x : 225
Thus x = 22.5 sq.ft.
Hence the picture will have an area of 22.5 sq.ft. when the projector is 15 ft
from the screen.
Mally