Answer
The other observer will measure a length of about 1.32 meters.
Work Step by Step
For this problem, we can simply use the 2 given values in the length contraction equation to find the length as measured from the other observer. Therefore;
$L=L_0 \sqrt{1-\beta^2}$
$L=1.70m \sqrt{1-(0.63)^2}$
$L=1.32m$
