The total mass of 2 packets of soya bean and 4 bags of sesame seed was 40 kg. Each bag of sesame seed was 8 kg lighter than each packet of soya bean.
- What was the mass of 1 packet of soya bean?
- What was the mass of 1 bag of sesame seed?
(a)
Mass of a bag of sesame seed = 1 u
Mass of a packet of soya bean = 1 u + 8
2 x (1 u + 8) + 4 x 1 u = 40
2 u + 16 + 4 u = 40
2 u + 4 u = 40 - 16
6 u = 24
1 u = 24 ÷ 6 = 4
Mass of 1 packet of soya bean
= 4 + 8
= 12 kg
(b)
Mass of 1 bag of sesame seed = 1 u = 4 kg
Answer(s): (a) 12 kg; (b) 4 kg