A container filled with 8 honeydews has a mass of 4.39 kg. The same container when filled with 8 mangoes has a mass of 1.27 kg. The mass of 1 honeydew is four times the mass of 1 mango. Find the mass of the container when it is empty. Express the answer in g.
1 kg = 1000 g

4.39 kg = 4390 g
1.27 kg = 1270 g

1 mango = 1 u
8 mangoes = 8 x 1 u = 8 u

1 container + 8 mangoes = 1270
1 container + 8 u = 1270 --- (1)

1 honeydew = 4 u
8 honeydews = 8 x 4 u = 32 u

1 container + 8 honeydews = 4390
1 container + 32 u = 4390 --- (2)

(2) - (1)
32 u - 8 u = 4390 - 1270
24 u = 3120

1 u = 3120 ÷ 24 = 130

8 u = 8 x 130 = 1040

From (1):
1 container + 8 u = 1270
1 container + 1040 = 1270
 
1 container = 1270 - 1040 = 230

Mass of 1 container = 230 g

Answer(s): 230 g