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Old 2007-09-15, 07:22   #7
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Jan 2004

205210 Posts
Thumbs up Tricky solutions.

Originally Posted by victor View Post
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. P-1 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.

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