Three types of pepper, A, B and C come in containers of 120 g, 200 g and 240 g respectively. Containers of A, B and C are mixed together in the ratio 1 : 3 : 6 to obtain 25.92 kg of an assortment of pepper.

1. How many containers of A and B are used altogether?
2. Find the difference between the combined weight of all the pepper in containers B and containers C as compared to the pepper in containers A. Express the weight in kilograms.

	A	B	C
Number	1 u	3 u	6 u
Value	120	200	240
Total value	120 u	600 u	1440 u

(a)
Total mass of pepper
= 120 u + 600 u + 1440 u
= 2160 u

2160 u = 25920

1 u = 25920 ÷ 2160 = 12

Total number of containers of A and B used
= 1 u + 3 u
= 4 u
= 4 x 12
= 48 

(b)
Combined weight of all the pepper in containers B and containers C
= 600 u + 1440 u
= 2040 u

Difference between the combined weight of all the pepper in containers B and containers C as compared to the pepper in containers A
= 2040 u - 120 u
= 1920 u
= 1920 x 12
= 23040 g
= 23.04 kg 

Answer(s): (a) 48; (b) 23.04 kg