tolong ya,pakai cara

Mapel : Matematika
Bab : Volume, Debit dan Waktu

V = 3/4 x 120 liter
    = 90 liter

Q = 15 liter/menit

t = v : Q
  = 90 liter : 15 liter/menit
  = 6 menit

V =>> 3/4 × 120 liter =>> 90 liter
Q =>> 15 liter / menit

t =>> V / Q
=>> 90 ÷ 15
=>> 6 menit