Find the volume of a cylinder = (area of cross section × height)

Make sure all your units are the same (convert 10m into cm).

volume of a cylinder = π x (10^2) x 1000 = 314,000 cubic cm

Bear in mind you don't have a whole cylinder here.

so

314,000 cubic cm x 0.5 = 157,000 cubic cm

Then remember 1 cubic cm =1 ml

so 157,000 cubic cm = 157,000 ml