Three types of chicken powder, V, W and X come in containers of 160 g, 280 g and 320 g respectively. Containers of V, W and X are mixed together in the ratio 3 : 4 : 5 to obtain 22.4 kg of an assortment of chicken powder.

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

	V	W	X
Number	3 u	4 u	5 u
Value	160	280	320
Total value	480 u	1120 u	1600 u

(a)
Total mass of chicken powder
= 480 u + 1120 u + 1600 u
= 3200 u

3200 u = 22400

1 u = 22400 ÷ 3200 = 7

Total number of containers of V and W used
= 3 u + 4 u
= 7 u
= 7 x 7
= 49 

(b)
Combined weight of all the chicken powder in containers W and containers X
= 1120 u + 1600 u
= 2720 u

Difference between the combined weight of all the chicken powder in containers W and containers X as compared to the chicken powder in containers V
= 2720 u - 480 u
= 2240 u
= 2240 x 7
= 15680 g
= 15.68 kg 

Answer(s): (a) 49; (b) 15.68 kg