Three types of curry powder, Q, R and S come in containers of 240 g, 300 g and 420 g respectively. Containers of Q, R and S are mixed together in the ratio 3 : 6 : 7 to obtain 65.52 kg of an assortment of curry powder.

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

	Q	R	S
Number	3 u	6 u	7 u
Value	240	300	420
Total value	720 u	1800 u	2940 u

(a)
Total mass of curry powder
= 720 u + 1800 u + 2940 u
= 5460 u

5460 u = 65520

1 u = 65520 ÷ 5460 = 12

Total number of containers of Q and R used
= 3 u + 6 u
= 9 u
= 9 x 12
= 108 

(b)
Combined weight of all the curry powder in containers R and containers S
= 1800 u + 2940 u
= 4740 u

Difference between the combined weight of all the curry powder in containers R and containers S as compared to the curry powder in containers Q
= 4740 u - 720 u
= 4020 u
= 4020 x 12
= 48240 g
= 48.24 kg 

Answer(s): (a) 108; (b) 48.24 kg