Three types of curry powder, C, D and E come in containers of 100 g, 250 g and 300 g respectively. Containers of C, D and E are mixed together in the ratio 3 : 5 : 7 to obtain 40.15 kg of an assortment of curry powder.

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

	C	D	E
Number	3 u	5 u	7 u
Value	100	250	300
Total value	300 u	1250 u	2100 u

(a)
Total mass of curry powder
= 300 u + 1250 u + 2100 u
= 3650 u

3650 u = 40150

1 u = 40150 ÷ 3650 = 11

Total number of containers of C and D used
= 3 u + 5 u
= 8 u
= 8 x 11
= 88 

(b)
Combined weight of all the curry powder in containers D and containers E
= 1250 u + 2100 u
= 3350 u

Difference between the combined weight of all the curry powder in containers D and containers E as compared to the curry powder in containers C
= 3350 u - 300 u
= 3050 u
= 3050 x 11
= 33550 g
= 33.55 kg 

Answer(s): (a) 88; (b) 33.55 kg