This Is a Certified Answer

Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
I hope the distance given is the horizontal distance covered = Range.

I hope also that the average speed given is = the average speed along the horizontal direction.

Then,  time the disk remained in air = 139 meters / 13.0 = 10.7 seconds.

In case the given data is for a projectile in two dimensions, with an angle of projection and average speed along the path traced, the solution is not simple.  It involves the path length of parabolic curve and requires integration operation etc..

1 5 1
click on thanks button above please
select best answer please