The total mass of 9 packets of ground pepper and 2 bags of brown rice was 38 kg. Each bag of brown rice was 3 kg lighter than each packet of ground pepper.
- What was the mass of 1 packet of ground pepper?
- What was the mass of 1 bag of brown rice?
(a)
Mass of a bag of brown rice = 1 u
Mass of a packet of ground pepper = 1 u + 3
9 x (1 u + 3) + 2 x 1 u = 38
9 u + 27 + 2 u = 38
9 u + 2 u = 38 - 27
11 u = 11
1 u = 11 ÷ 11 = 1
Mass of 1 packet of ground pepper
= 1 + 3
= 4 kg
(b)
Mass of 1 bag of brown rice = 1 u = 1 kg
Answer(s): (a) 4 kg; (b) 1 kg