What path will a ball suspended on a thread take in five complete vibrations if the vibration amplitude is 6cm?

First, let’s calculate how far the ball goes in one full swing.
Starting from the point of equilibrium, the ball must reach the extreme point of deflection after passing a distance equal to the amplitude and return to its starting position.
Then deviate in a different direction and again return to the point of balance.
This means that in one vibration, the ball travels a path equal to 4 amplitudes.
And for 5 full oscillations, a path equal to 20 amplitudes will pass.
The ball will pass 20 * 6cm = 120cm.