we can see that
Z , L and S are three points of line ZS
so, Z , L and S are collinear
and
Z , L and S lie on plane M
so, they are coplanar
so, option-C....................Answer
Okay, so I know that you either multiply the volume of a cone by 3 to get the cylinders volume, or you divide it. I think you multiply it. Just remember, the rule is to multiply the volume of a cone by 3, to get the cylinder volume with the same measurements. So 15 x 3.