40 liter/detik...dam^3/jam

1 liter = 1 dm³ = 0,001 dam³
1 detik = 1/3600 jam

40 liter /detik = 40 x 0,001 dam³ : 1/3600 detik
                     =0,04 x 3600/1
                     =144 dam³/jam

1 liter ,= 1 dm^3
40 liter = 40 : 1000.000 dam^3
= 0,00004
1 detik = 1: 3600 jam
40 liter/detik = ... dam^3/jam
= (40:1000.000) x 3.600
= 0,00004 x 3.600
= 0,144 dam^3/jam