Answer:
76 cm³
Explanation:
you need to look at the formula for the volume of a cylinder.
Vc = ground area × height
and the ground area of a cylinder is a circle.
the area of a circle is : pi×r²
with r being the radius.
so,
Vc = pi×r² × height = 19 cm³
now, the radius (r) is doubled.
so, the new volume is
Vcnew = pi×(2r)² × height = pi×4r² × height =
= pi×r² × height × 4 = Vc × 4 = 19×4 = 76 cm³