Three types of curry powder, T, U and V come in containers of 90 g, 150 g and 240 g respectively. Containers of T, U and V are mixed together in the ratio 2 : 4 : 5 to obtain 21.78 kg of an assortment of curry powder.

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

	T	U	V
Number	2 u	4 u	5 u
Value	90	150	240
Total value	180 u	600 u	1200 u

(a)
Total mass of curry powder
= 180 u + 600 u + 1200 u
= 1980 u

1980 u = 21780

1 u = 21780 ÷ 1980 = 11

Total number of containers of T and U used
= 2 u + 4 u
= 6 u
= 6 x 11
= 66 

(b)
Combined weight of all the curry powder in containers U and containers V
= 600 u + 1200 u
= 1800 u

Difference between the combined weight of all the curry powder in containers U and containers V as compared to the curry powder in containers T
= 1800 u - 180 u
= 1620 u
= 1620 x 11
= 17820 g
= 17.82 kg 

Answer(s): (a) 66; (b) 17.82 kg