Three types of flour, H, J and K come in containers of 120 g, 210 g and 300 g respectively. Containers of H, J and K are mixed together in the ratio 2 : 3 : 4 to obtain 14.49 kg of an assortment of flour.

1. How many containers of H and J are used altogether?
2. Find the difference between the combined weight of all the flour in containers J and containers K as compared to the flour in containers H. Express the weight in kilograms.

	H	J	K
Number	2 u	3 u	4 u
Value	120	210	300
Total value	240 u	630 u	1200 u

(a)
Total mass of flour
= 240 u + 630 u + 1200 u
= 2070 u

2070 u = 14490

1 u = 14490 ÷ 2070 = 7

Total number of containers of H and J used
= 2 u + 3 u
= 5 u
= 5 x 7
= 35 

(b)
Combined weight of all the flour in containers J and containers K
= 630 u + 1200 u
= 1830 u

Difference between the combined weight of all the flour in containers J and containers K as compared to the flour in containers H
= 1830 u - 240 u
= 1590 u
= 1590 x 7
= 11130 g
= 11.13 kg 

Answer(s): (a) 35; (b) 11.13 kg