The total mass of 2 bags of oat and 2 packets of red bean was 46 kg. Each packet of red bean was 5 kg lighter than each bag of oat.
- What was the mass of 1 bag of oat?
- What was the mass of 1 packet of red bean?
(a)
Mass of a packet of red bean = 1 u
Mass of a bag of oat = 1 u + 5
2 x (1 u + 5) + 2 x 1 u = 46
2 u + 10 + 2 u = 46
2 u + 2 u = 46 - 10
4 u = 36
1 u = 36 ÷ 4 = 9
Mass of 1 bag of oat
= 9 + 5
= 14 kg
(b)
Mass of 1 packet of red bean = 1 u = 9 kg
Answer(s): (a) 14 kg; (b) 9 kg