Three types of rice flour, V, W and X come in containers of 150 g, 250 g and 400 g respectively. Containers of V, W and X are mixed together in the ratio 1 : 2 : 3 to obtain 11.1 kg of an assortment of rice flour.

1. How many containers of V and W are used altogether?
2. Find the difference between the combined weight of all the rice flour in containers W and containers X as compared to the rice flour in containers V. Express the weight in kilograms.

	V	W	X
Number	1 u	2 u	3 u
Value	150	250	400
Total value	150 u	500 u	1200 u

(a)
Total mass of rice flour
= 150 u + 500 u + 1200 u
= 1850 u

1850 u = 11100

1 u = 11100 ÷ 1850 = 6

Total number of containers of V and W used
= 1 u + 2 u
= 3 u
= 3 x 6
= 18 

(b)
Combined weight of all the rice flour in containers W and containers X
= 500 u + 1200 u
= 1700 u

Difference between the combined weight of all the rice flour in containers W and containers X as compared to the rice flour in containers V
= 1700 u - 150 u
= 1550 u
= 1550 x 6
= 9300 g
= 9.3 kg 

Answer(s): (a) 18; (b) 9.3 kg