Three types of chicken powder, R, S and T come in containers of 120 g, 200 g and 320 g respectively. Containers of R, S and T are mixed together in the ratio 1 : 2 : 5 to obtain 23.32 kg of an assortment of chicken powder.

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

	R	S	T
Number	1 u	2 u	5 u
Value	120	200	320
Total value	120 u	400 u	1600 u

(a)
Total mass of chicken powder
= 120 u + 400 u + 1600 u
= 2120 u

2120 u = 23320

1 u = 23320 ÷ 2120 = 11

Total number of containers of R and S used
= 1 u + 2 u
= 3 u
= 3 x 11
= 33 

(b)
Combined weight of all the chicken powder in containers S and containers T
= 400 u + 1600 u
= 2000 u

Difference between the combined weight of all the chicken powder in containers S and containers T as compared to the chicken powder in containers R
= 2000 u - 120 u
= 1880 u
= 1880 x 11
= 20680 g
= 20.68 kg 

Answer(s): (a) 33; (b) 20.68 kg