A container filled with 8 jackfruits has a mass of 5.35 kg. The same container when filled with 5 oranges has a mass of 0.8 kg. The mass of 1 jackfruit is five times the mass of 1 orange. Find the mass of the container when it is empty. Express the answer in g.
1 kg = 1000 g

5.35 kg = 5350 g
0.8 kg = 800 g

1 orange = 1 u
5 oranges = 5 x 1 u = 5 u

1 container + 5 oranges = 800
1 container + 5 u = 800 --- (1)

1 jackfruit = 5 u
8 jackfruits = 8 x 5 u = 40 u

1 container + 8 jackfruits = 5350
1 container + 40 u = 5350 --- (2)

(2) - (1)
40 u - 5 u = 5350 - 800
35 u = 4550

1 u = 4550 ÷ 35 = 130

5 u = 5 x 130 = 650

From (1):
1 container + 5 u = 800
1 container + 650 = 800
 
1 container = 800 - 650 = 150

Mass of 1 container = 150 g

Answer(s): 150 g