A container filled with 8 mangoes has a mass of 6.41 kg. The same container when filled with 10 pomegranates has a mass of 1.47 kg. The mass of 1 mango is six times the mass of 1 pomegranate. Find the mass of the container when it is empty. Express the answer in g.
1 kg = 1000 g

6.41 kg = 6410 g
1.47 kg = 1470 g

1 pomegranate = 1 u
10 pomegranates = 10 x 1 u = 10 u

1 container + 10 pomegranates = 1470
1 container + 10 u = 1470 --- (1)

1 mango = 6 u
8 mangoes = 8 x 6 u = 48 u

1 container + 8 mangoes = 6410
1 container + 48 u = 6410 --- (2)

(2) - (1)
48 u - 10 u = 6410 - 1470
38 u = 4940

1 u = 4940 ÷ 38 = 130

10 u = 10 x 130 = 1300

From (1):
1 container + 10 u = 1470
1 container + 1300 = 1470
 
1 container = 1470 - 1300 = 170

Mass of 1 container = 170 g

Answer(s): 170 g