A man walked diagonally across a square plot. Approximately what was the percent saved by not walking along the edges?

• A. 10%
• B. 40%
• C. 20%
• D. 30%

Answer: (D)

let the side of the square be x meterslength of two sides = 2x metersdiagonal =  2 x = 1.414x m   saving on 2x meters = .59x m   saving % =  0 . 59 x 2 x * 100 %   = 30% (approx)