tolong ya pake caranya

r = 7/2
t = 12
t(waktu) = ?
v = 6 liter per menit

V = π.r.r.t
V = 22/7.7/2.7/2.12
V = 22.7.3

t(waktu) = 22.7.3/6 = 11.7
= 77 menit = 1 jam 17 menit