Three types of chicken powder, R, S and T come in containers of 60 g, 90 g and 180 g respectively. Containers of R, S and T are mixed together in the ratio 2 : 3 : 6 to obtain 14.7 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	2 u	3 u	6 u
Value	60	90	180
Total value	120 u	270 u	1080 u

(a)
Total mass of chicken powder
= 120 u + 270 u + 1080 u
= 1470 u

1470 u = 14700

1 u = 14700 ÷ 1470 = 10

Total number of containers of R and S used
= 2 u + 3 u
= 5 u
= 5 x 10
= 50 

(b)
Combined weight of all the chicken powder in containers S and containers T
= 270 u + 1080 u
= 1350 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
= 1350 u - 120 u
= 1230 u
= 1230 x 10
= 12300 g
= 12.3 kg 

Answer(s): (a) 50; (b) 12.3 kg