Three types of chicken powder, U, V and W come in containers of 120 g, 200 g and 280 g respectively. Containers of U, V and W are mixed together in the ratio 1 : 3 : 4 to obtain 22.08 kg of an assortment of chicken powder.

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

	U	V	W
Number	1 u	3 u	4 u
Value	120	200	280
Total value	120 u	600 u	1120 u

(a)
Total mass of chicken powder
= 120 u + 600 u + 1120 u
= 1840 u

1840 u = 22080

1 u = 22080 ÷ 1840 = 12

Total number of containers of U and V used
= 1 u + 3 u
= 4 u
= 4 x 12
= 48 

(b)
Combined weight of all the chicken powder in containers V and containers W
= 600 u + 1120 u
= 1720 u

Difference between the combined weight of all the chicken powder in containers V and containers W as compared to the chicken powder in containers U
= 1720 u - 120 u
= 1600 u
= 1600 x 12
= 19200 g
= 19.2 kg 

Answer(s): (a) 48; (b) 19.2 kg