tolong di jawab beserta caranya y.......besok di kumpulkan

1 ton = 1000 kg
6 3/4 kuintal = 675 kg
280 1/2 kg = 280,5 kg
1000 kg - 675 kg - 280,5 kg = 44,5 kg = 0,445 kuintal 

1 ton = 10 kwintal = 1000 kg
10kw - ( 6 3/4kw + 280 1/2kg)
10 - (6.75+2.805)
10- 9.555 = 0.455 kw

good luck ;-)