How much distance saved, in terms of percent, in diagonal of the square compared to the along sides?
Option:
A. 30%
B. 40%
C. 60%
D. 70%
Answer: A . 30%
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Justification:
The side of the square is a.
=> Diagonal size is = Sq. root of (a^2 + a^2) = Sq. root of (2a^2) = (approx) 1.41a
=> Distance saved is = (2a - 1.41a/2a) *100% = 0.59/2*100 = (approx) 30%
