Algebra!!
posted by Renee .
1)volume of a ctlinder: 198mm
Radius base: ??
Height of cylinder: 7mm
2)Volume of a triangular prism:60 cu yd
Length of base: ??
Height of base: 6m
Height of prism: 2m

volume of cylinder = πr^2 h
198 = π r^2 (7)
r^2 = 198/(7π) = 9.0036..
appr 9 mm
#2,
I would have to know what kind of a triangle the base is