175
PI is what
(i.imgur.com)
The volume of a cylinder is found using the formula V = πr^2^h. Using π = 5, r = 10 and h = 10. Find the volume V.
I also guess that was the intention. But then, why choose an example involving Pi? There are so many ways to test simple multiplications. Books per student, students per class, classes per school, something like that. Or calculate a simple 3D shape which is not round.
That is probably laziness lol