Airplanes
A and
B are in the same vertical plane and flying with constant velocity. At time
t=0 sec, an observer in
A finds
B at a distance of
500 m and moving perpendicular to the line of motion of
A. If at
t=t0 sec,
A just escapes being hit by
B ,
t0 in seconds is
![](https://df0b18phdhzpx.cloudfront.net/ckeditor_assets/pictures/968882/original_Q1.png)