A fly on the outer edge of a 4m diameter airplane propeller starts from rest and rotates 800 times in 8 seconds. Find the tangental velocity after 8 seconds.

I have no idea how to figure this out can someone help me!

Recall: s= ut + \frac12 at^2

t = 8 s
u = 0
s = 800 * Circumference
a = ?

to find the acceleration

Then use:

v = u + at

to find the final speed v.

What's the circumference for s 800 times what?

Remember:

Circumference = 2\pi r = \pi d

You have d, the diameter.