40 liter/detik – 2m3/menit=…. liter/menit

1 detik = 1/60 menit
1 m^3 = 1000 dm^3 = 1000 liter

40 liter/detik = 40 x 1 / (1/60) = 40 x 60 = 2400 liter/menit

2 m^3/menit = 2 x (1000/1) = 2000 liter/menit

jadi, 2400 liter/menit – 2000 liter/menit = 400 liter/menit