Three types of rice flour, T, U and V come in containers of 120 g, 240 g and 320 g respectively. Containers of T, U and V are mixed together in the ratio 2 : 3 : 6 to obtain 23.04 kg of an assortment of rice flour.

1. How many containers of T and U are used altogether?
2. Find the difference between the combined weight of all the rice flour in containers U and containers V as compared to the rice flour in containers T. Express the weight in kilograms.

	T	U	V
Number	2 u	3 u	6 u
Value	120	240	320
Total value	240 u	720 u	1920 u

(a)
Total mass of rice flour
= 240 u + 720 u + 1920 u
= 2880 u

2880 u = 23040

1 u = 23040 ÷ 2880 = 8

Total number of containers of T and U used
= 2 u + 3 u
= 5 u
= 5 x 8
= 40 

(b)
Combined weight of all the rice flour in containers U and containers V
= 720 u + 1920 u
= 2640 u

Difference between the combined weight of all the rice flour in containers U and containers V as compared to the rice flour in containers T
= 2640 u - 240 u
= 2400 u
= 2400 x 8
= 19200 g
= 19.2 kg 

Answer(s): (a) 40; (b) 19.2 kg