The total mass of 3 packets of maize and 3 bags of black bean was 36 kg. Each bag of black bean was 4 kg lighter than each packet of maize.
- What was the mass of 1 packet of maize?
- What was the mass of 1 bag of black bean?
(a)
Mass of a bag of black bean = 1 u
Mass of a packet of maize = 1 u + 4
3 x (1 u + 4) + 3 x 1 u = 36
3 u + 12 + 3 u = 36
3 u + 3 u = 36 - 12
6 u = 24
1 u = 24 ÷ 6 = 4
Mass of 1 packet of maize
= 4 + 4
= 8 kg
(b)
Mass of 1 bag of black bean = 1 u = 4 kg
Answer(s): (a) 8 kg; (b) 4 kg