Three types of chicken powder, P, Q and R come in containers of 120 g, 150 g and 240 g respectively. Containers of P, Q and R are mixed together in the ratio 2 : 5 : 6 to obtain 19.44 kg of an assortment of chicken powder.

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

	P	Q	R
Number	2 u	5 u	6 u
Value	120	150	240
Total value	240 u	750 u	1440 u

(a)
Total mass of chicken powder
= 240 u + 750 u + 1440 u
= 2430 u

2430 u = 19440

1 u = 19440 ÷ 2430 = 8

Total number of containers of P and Q used
= 2 u + 5 u
= 7 u
= 7 x 8
= 56 

(b)
Combined weight of all the chicken powder in containers Q and containers R
= 750 u + 1440 u
= 2190 u

Difference between the combined weight of all the chicken powder in containers Q and containers R as compared to the chicken powder in containers P
= 2190 u - 240 u
= 1950 u
= 1950 x 8
= 15600 g
= 15.6 kg 

Answer(s): (a) 56; (b) 15.6 kg