Question 154849
Let x be the width of the original paper.
DIMENSIONS BEFORE FOLDING:
length: 11
width: x
DIMENSIONS AFTER FOLDING
length: x
width: 11/2
As the ratio of length to width remains unchanged, we have
11 : x = x : 11/2
Cross-multiplying it, we have
{{{x^2=11^2/2}}}
Solving for x, we have
{{{x=sqrt(11^2/2)=11/sqrt(2)}}}