=20/3
I hope I helped!
Happy new years,
Cheers,
Mabel L.
Given,
Rate of free fall = 216 km/h
Solution,
km/h to m/s is converted as follows :

So, the rate of fall is 60 m/s.
If t = 20 s
Assume, initial velocity = 0
It will move under the action of gravity.
Using equation of motion,

Hence, this is all for the solution.
The pencil is 19.05 centimeters.